path: root/Master/texmf-dist/source/latex/geometry/geometry.dtx

% \iffalse meta-comment
%
% Copyright 1996-2010 by Hideo Umeki <latexgeometry@gmail.com>
%
% LaTeX Package: Geometry
% -----------------------
%
% This work may be distributed and/or modified under the conditions of
% the LaTeX Project Public License, either version 1.3c of this license
% or (at your option) any later version. The latest version of this
% license is in
%    http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% This work is "maintained" (as per the LPPL maintenance status)
% by Hideo Umeki.
%
% This work consists of the files geometry.dtx and
% the derived files: geometry.{sty,ins,drv}, geometry-samples.tex.
%
% * Distribution
%    CTAN: macros/latex/contrib/geometry/README
%    CTAN: macros/latex/contrib/geometry/changes.txt
%    CTAN: macros/latex/contrib/geometry/geometry.ins
%    CTAN: macros/latex/contrib/geometry/geometry.dtx
%    CTAN: macros/latex/contrib/geometry/geometry.pdf
%
% * To get geometry.sty out of geometry.dtx
%        $ tex geometry.dtx
%    or  $ tex geometry.ins
%
% * To build documentation
%        $ latex geometry.dtx
%    or  $ latex geometry.drv
%
% * Installation
%    TDS:tex/latex/geometry/geometry.sty
%    TDS:doc/latex/geometry/geometry.pdf
%    TDS:source/latex/geometry/geometry.dtx
%        
%<*ignore>
\begingroup
  \def\x{LaTeX2e}
\expandafter\endgroup
\ifcase 0\ifx\install y1\fi\expandafter
         \ifx\csname processbatchFile\endcsname\relax\else1\fi
         \ifx\fmtname\x\else 1\fi\relax
\else\csname fi\endcsname
%</ignore>
%<package|driver>\NeedsTeXFormat{LaTeX2e}
%<package>\ProvidesPackage{geometry}
%<package>  [2010/02/15 v5.1 Page Geometry]
%<*install>
\input docstrip.tex
\Msg{************************************************************************}
\Msg{* Installation}
\Msg{* Package: geometry 2010/02/15 v5.1 Page Geometry}
\Msg{************************************************************************}

\keepsilent
\askforoverwritefalse
\preamble

Copyright (C) 1996-2010
by Hideo Umeki <latexgeometry@gmail.com>

This work may be distributed and/or modified under the conditions of
the LaTeX Project Public License, either version 1.3c of this license
or (at your option) any later version. The latest version of this
license is in
   http://www.latex-project.org/lppl.txt
and version 1.3c or later is part of all distributions of LaTeX
version 2005/12/01 or later.

This work is "maintained" (as per the LPPL maintenance status)
by Hideo Umeki.

This work consists of the files geometry.dtx and
the derived files: geometry.{sty,ins,drv}, geometry-samples.tex.

\endpreamble

\generate{%
  \file{geometry.ins}{\from{geometry.dtx}{install}}%
  \file{geometry.drv}{\from{geometry.dtx}{driver}}%
  \usedir{tex/latex/geometry}%
  \file{geometry.sty}{\from{geometry.dtx}{package}}%
  \file{geometry.cfg}{\from{geometry.dtx}{config}}%
  \file{geometry-samples.tex}{\from{geometry.dtx}{samples}}%
}

\obeyspaces
\Msg{************************************************************************}
\Msg{*}
\Msg{* To finish the installation you have to move the following}
\Msg{* file into a directory searched by LaTeX:}
\Msg{*}
\Msg{* \space\space geometry.sty}
\Msg{*}
\Msg{* To produce the documentation run the file `geometry.drv'}
\Msg{* through LaTeX.}
\Msg{*}
\Msg{* Happy TeXing!}
\Msg{*}
\Msg{************************************************************************}
\endbatchfile
%</install>
%<*ignore>
\fi
%</ignore>
%<*driver>
\ProvidesFile{geometry.drv}
\documentclass{ltxdoc}
\usepackage[colorlinks, linkcolor=blue]{hyperref}
\usepackage[a4paper, hmargin=2.5cm, vmargin=1cm, 
        includeheadfoot]{geometry}
\begin{document}
 \DocInput{geometry.dtx}
\end{document}
%</driver>
% \fi
%
% \CheckSum{2722}
%
% \CharacterTable
%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
%   Right bracket \]     Circumflex    \^     Underscore    \_
%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%   Right brace   \}     Tilde         \~}
%
% \GetFileInfo{geometry.sty}
%
% \title{The \textsf{geometry} package}
% \date{\filedate\ \fileversion}
% \author{Hideo Umeki\\\texttt{latexgeometry@gmail.com}}
%
% \MakeShortVerb{|}
%
% \def\OpenB{{\ttfamily\char`\{}}
% \def\Comma{{\ttfamily\char`,}}
% \def\CloseB{{\ttfamily\char`\}}}
% \def\Gm{\textsf{geometry}}
% \newcommand\argii[2]{\OpenB\meta{#1}\Comma\meta{#2}\CloseB}
% \newcommand\argiii[3]{\OpenB\meta{#1}\Comma\meta{#2}\Comma\meta{#3}\CloseB}
% \newcommand\vargii[2]{\OpenB#1\Comma#2\CloseB}
% \newcommand\vargiii[3]{\OpenB#1\Comma#2\Comma#3\CloseB}
% \newcommand\OR{\ \strut\vrule width .4pt\ }
% \newcommand\gpart[1]{\textsl{#1}}
% \newcommand\glen[1]{\textsf{#1}}
% \newenvironment{key}[2]{\expandafter\macro\expandafter{`#2'}}{\endmacro}
% \newenvironment{Options}%
%  {\begin{list}{}{%
%   \renewcommand{\makelabel}[1]{\texttt{##1}\hfil}%
%   \setlength{\itemsep}{-.5\parsep}
%   \settowidth{\labelwidth}{\texttt{xxxxxxxxxxx\space}}%
%   \setlength{\leftmargin}{\labelwidth}%
%   \addtolength{\leftmargin}{\labelsep}}%
%   \raggedright}
%  {\end{list}}
% \newenvironment{Spec}%
%  {\begin{list}{}{%
%   \renewcommand{\makelabel}[1]{\fbox{##1}\hfil}%
%   \setlength{\itemsep}{-.5\parsep}
%   \settowidth{\labelwidth}{\texttt{S(x,x)}}%
%   \setlength{\leftmargin}{\labelwidth}%
%   \addtolength{\leftmargin}{\labelsep}%
%   \addtolength{\leftmargin}{2em}%
%   \setlength{\rightmargin}{2em}}%
%   \raggedright}
%  {\end{list}}
% \def\Ss(#1,#2){\textsf{S(#1,#2)}}%
% \def\Sp(#1,#2,#3){\mbox{|(#1,#2,#3)|}}%
% \def\onlypre{\llap{$^{\dagger\:}$}}%
%
% \maketitle
%
% \begin{abstract}
% This package provides a flexible and easy interface to page dimensions.
% You can change the page layout with intuitive parameters. For instance,
% if you want to set a margin to 2cm from each edge of the paper,
% you can go just |\usepackage[margin=2cm]{geometry}|. With
% |\newgeometry| command  you can change the layout anywhere in the
% document.
% \end{abstract}
%
% \section{Preface to version 5}
%
% \begin{itemize}
%  \item \textbf{Changing page layout mid-document.}\par
%   The new commands \cs{newgeometry\{$\cdots$\}} and
%   \cs{restoregeometry} allow users to change page dimensions in the
%   middle of the document. \cs{newgeometry} is almost similar to 
%   \cs{geometry} except that \cs{newgeometry} disables all the options
%   specified in the preamble and skips the papersize-related options:
%    |landscape|,|portrait| and paper size options (such as
%    |papersize|, |paper=a4paper| and so forth).
%  \item \textbf{A new set of options to specify the layout area.}\par
%   The options specified for the area, in which the page dimensions
%   are calculated, are added: \textsf{layout}, \textsf{layoutsize}, 
%   \textsf{layoutwidth}, \textsf{layoutheight} and so forth.
%   These options would help to print the specified
%   layout to a different sized paper.  For example, with |a4paper|
%   and |layout=a5paper|, the \Gm\ package uses `A5' layout to
%   calculate margins with the paper size still `A4'.
%  \item \textbf{A new driver option |xetex|.}\par
%   The new driver option |xetex| is added. The driver auto-detection
%   routine has been revised so as to avoid an error with undefined
%   control sequences. Note that `geometry.cfg' in TeXLive, which
%   disables the auto-detection routine and sets |pdftex|, is no
%   longer necessary and has no problem even though it still exists.
%   To set |xetex| is strongly recommended with XeLaTeX.
%  \item \textbf{New paper size presets for JIS B-series.}\par
%   The papersize presets |b0j| to |b6j| for JIS (Japanese Industrial
%   Standards) B-series are added.
%  \item \textbf{Changing default for underspecified margin.}\par
%   In the previous version, if only one margin was specified,
%   |bottom=1cm| for example, then \Gm\ set the other margin with
%   the margin ratio (1:1 by default for the vertical dimensions)
%   and got |top|=1cm in this case.
%   The version 5 sets the text-body size with the default |scale|
%   (=0.7) and determine the unspecified margin. (See Section~\ref{sec:rules}) 
%  \item \textbf{The option |showframe| works on every page.}\par
%   With |showframe| option, the page frames are shown on every page.
%   In addition, the new option |showcrop| would print cropmarks showing
%   the corners of the layout (the same as paper by default) on every page.
%  \item \textbf{Loading geometry.cfg precedes processing class options.}\par
%    The previous version loaded \textsf{geometry.cfg} after
%    processing the document class options.  Now that the config file is
%    loaded before processing the class options, you can change the
%    behavior specified in \textsf{geometry.cfg} by adding options
%    into |\documentclass| as well as |\usepackage| and |\geometry|.
%  \item \textbf{Deleted options: |compat2| and |twosideshift|.}
%    The version 5 has no longer compatibility with the previous ones.
%    |compat2| and |twosideshift| are gone for simplicity. 
% \end{itemize}
%
% \section{Introduction}
%
% To set dimensions for page layout in \LaTeX\ is not straightforward. 
% You need to adjust several \LaTeX{} native dimensions to place a text area
% where you want
% If you want to center the text area in the paper you use, for example, 
% you have to specify native dimensions as follows:
% \begin{quote}
%    |\usepackage{calc}|\\
%    |\setlength\textwidth{7in}|\\
%    |\setlength\textheight{10in}|\\
%    |\setlength\oddsidemargin{(\paperwidth-\textwidth)/2 - 1in}|\\
%    |\setlength\topmargin{(\paperheight-\textheight|\\
%    |                      -\headheight-\headsep-\footskip)/2 - 1in}|.
% \end{quote}
% Without package \textsl{calc}, the above example would need
% more tedious settings. Package \Gm\ provides an easy
% way to set page layout parameters. In this case, what you have to do
% is just
% \begin{quote}
%    |\usepackage[text={7in,10in},centering]{geometry}|. 
% \end{quote}
% Besides centering problem, setting margins from each edge of the paper is
% also troublesome. But \Gm\ also make it easy.
% If you want to set each margin 1.5in, you can go 
% \begin{quote}
%    |\usepackage[margin=1.5in]{geometry}| 
% \end{quote}
% Thus, the geometry package has an auto-completion mechanisim, in which
% unspecified dimensions are automatically determined.
% The \Gm\ package will be also useful when you have to set page layout
% obeying the following strict instructions: for example,
% \begin{quote}\slshape
%   The total allowable width of the text area is 6.5 inches wide by 8.75
%   inches high. The top margin on each page should be 1.2 inches from
%   the top edge of the page. The left margin should be 0.9 inch from 
%   the left edge. The footer with page number should be at the bottom
%   of the text area.
% \end{quote}
% In this case, using \Gm\ you can go 
% \begin{quote}
% |\usepackage[total={6.5in,8.75in},|\\
% |            top=1.2in, left=0.9in, includefoot]{geometry}|.
% \end{quote}
%
% Setting a text area on the paper in document preparation system has some
% analogy to placing a window on the background in the window system. 
% The name `geometry' comes from the |-geometry| option used for specifying
% a size and location of a window in X Window System.
%
% \section{Page geometry}
%
% Figure~\ref{fig:layout} shows the page layout dimensions defined
% in the \Gm\ package.
% The page layout contains a \gpart{total body} (printable area) and \gpart{margins}. 
% The \gpart{total body} consists of a \gpart{body} (text area) with an
% optional \gpart{header}, \gpart{footer} and marginal notes (marginpar).
% There are four margins: \gpart{left}, \gpart{right}, \gpart{top} and
% \gpart{bottom}. For twosided documents, horizontal
% margins should be called \gpart{inner} and \gpart{outer}.
% \begin{quote}
%  \begin{tabular}{rcl}
%   \gpart{paper}&:&\gpart{total body} and
%   \gpart{margins}\\
%   \gpart{total body}&:&\gpart{body} (text area)\quad
%             (optional \gpart{head}, \gpart{foot} and \gpart{marginpar})\\
%   \gpart{margins}&:&\gpart{left}(\gpart{inner}), 
%      \gpart{right}(\gpart{outer}), \gpart{top} and \gpart{bottom}
%   \end{tabular}
% \end{quote}
% Each margin is measured from the corresponding edge of a paper. 
% For example, left margin (inner margin) means a horizontal distance
% between the left (inner) edge of the paper and that of the total body.
% Therefore the left and top margins defined in \Gm\ are different
% from the native dimensions \cs{leftmargin} and \cs{topmargin}.
% The size of a body (text area) can be modified by \cs{textwidth} and
% \cs{textheight}. 
% The dimensions for paper, total body and margins have the following
% relations.
% \begin{eqnarray}
%  \label{eq:paperwidth}
%  |paperwidth| &=& |left|+|width|+|right| \\
%  |paperheight| &=& |top|+|height|+|bottom|
%  \label{eq:paperheight}
% \end{eqnarray}
%
% \begin{figure}
%  \centering\small
%  {\unitlength=.65pt
%  \begin{picture}(450,250)(0,-10)
%  \put(20,0){\framebox(170,230){}}
%  \put(20,235){\makebox(170,230)[br]{\gpart{paper}}}
%  \begingroup\thicklines
%  \put(40,30){\framebox(120,170){}}\endgroup
%  \put(40,30){\makebox(120,165)[tr]{\gpart{total body}~}}
%  \put(45,30){\makebox(0,170)[l]{|height|}}
%  \put(40,35){\makebox(120,0)[bc]{|width|}}
%  \put(50,-20){\makebox(120,0)[bc]{|paperwidth|}}
%  \put(10,45){\makebox(0,170)[r]{|paperheight|}}
%  \put(90,200){\makebox(0,30)[lc]{|top|}}
%  \put(90,0){\makebox(0,30)[lc]{|bottom|}}
%  \put(10,70){\makebox(0,0)[r]{|left|}}
%  \put(10,55){\makebox(0,0)[r]{(|inner|)}}
%  \put(200,70){\makebox(0,0)[l]{|right|}}
%  \put(200,55){\makebox(0,0)[l]{(|outer|)}}
%  \put(80,230){\vector(0,-1){30}}\put(80,30){\vector(0,-1){30}}
%  \put(80,200){\vector(0,1){30}}\put(80,0){\vector(0,1){30}}
%  \put(20,70){\vector(1,0){20}}\put(40,70){\vector(-1,0){20}}
%  \put(160,70){\vector(1,0){30}}\put(190,70){\vector(-1,0){30}}
%  \multiput(160,30)(5,0){24}{\line(1,0){2}}
%  \multiput(160,200)(5,0){24}{\line(1,0){2}}
%  \begingroup\thicklines
%  \put(280,30){\framebox(120,170){}}\endgroup
%  \put(283,133){\makebox(0,12)[l]{|textheight|}}
%  \put(295,130){\vector(0,-1){100}}\put(295,150){\vector(0,1){50}}
%  \multiput(280,220)(5,0){24}{\line(1,0){3}}
%  \put(280,208){\makebox(120,20)[bc]{\gpart{head}}}
%  \multiput(280,207)(5,0){24}{\line(1,0){3}}
%  \put(420,225){\makebox(0,0)[l]{|headheight|}}
%  \put(418,225){\line(-2,-1){20}}
%  \put(420,213){\makebox(0,0)[l]{|headsep|}}
%  \put(418,213){\line(-2,-1){20}}
%  \put(420,12){\makebox(0,0)[l]{|footskip|}}
%  \put(418,12){\line(-2,1){20}}
%  \put(280,40){\makebox(120,140)[c]{\gpart{body}}}
%  \put(305,45){\vector(-1,0){25}}\put(375,45){\vector(1,0){25}}
%  \put(80,230){\vector(0,-1){30}}\put(80,30){\vector(0,-1){30}}
%  \put(280,48){\makebox(120,0)[c]{|textwidth|}}
%  \put(280,15){\makebox(120,10)[c]{\gpart{foot}}}
%  \multiput(280,14)(5,0){24}{\line(1,0){2}}
%  \put(410,30){\dashbox{3}(30,170){}}
%  \put(415,30){\makebox(30,170)[l]{\gpart{marginal note}}}
%  \put(425,45){\vector(-1,0){15}}\put(425,45){\vector(1,0){15}}
%  \put(450,70){\makebox(0,0)[l]{|marginparsep|}}
%  \put(448,70){\line(-3,-1){43}}
%  \put(450,45){\makebox(0,0)[l]{|marginparwidth|}}
%  \end{picture}}
%  \caption[Dimension names for \Gm]{%
%  \begin{minipage}[t]{.8\textwidth}\raggedright\small
%  Dimension names used in the \Gm\ package.
%  |width|=|textwidth| and |height|=|textheight| by default.
%  |left|, |right|, |top| and |bottom| are margins. 
%  If margins on verso pages are swapped by |twoside| option,
%  margins specified by |left| and |right| options
%  are used for the inside and outside margins respectively.
%  |inner| and |outer| are aliases of |left| and |right|
%  respectively.
%  \end{minipage}}
%  \label{fig:layout}
% \end{figure}
%
% The total body |width| and |height| would be defined:
% \begin{eqnarray}
%  \label{eq:width}
%  |width| &:=& |textwidth| \quad( +  |marginparsep| + |marginparwidth| )\\
%  |height| &:=& |textheight| \quad(+ |headheight| + |headsep| + |footskip| )
%  \label{eq:height}
% \end{eqnarray}
% In Equation (\ref{eq:width}) |width:=textwidth| by default, 
% while |marginparsep| and |marginparwidth| are included in |width|
% if |includemp| option is set |true|. 
% In Equation (\ref{eq:height}), |height:=textheight| by default. 
% If |includehead| is set to |true|, |headheight| and |headsep| are
% considered as a part of |height|.
% In the same way, |includefoot| takes |footskip| into |height|. 
% Figure~\ref{fig:includes} shows how these options
% work in the vertical direction.
% \begin{figure}
%  \centering\small
%  {\unitlength=.65pt
%  \begin{picture}(490,280)(0,-10)
%  \put(60,250){\makebox(120,0)[bl]{\textbf{(a)}~\textit{default}}}%
%  \put(20,0){\framebox(170,230){}}
%  \put(20,230){\makebox(170,15)[r]{\gpart{paper}}}
%  \begingroup\thicklines
%  \put(40,30){\framebox(120,165){}}\endgroup
%  \put(70,165){\vector(0,1){30}}
%  \put(55,145){\makebox(0,20)[lc]{|textheight|}}
%  \put(70,145){\vector(0,-1){115}}
%  \multiput(40,203)(5,0){24}{\line(1,0){3}}
%  \multiput(40,213)(5,0){24}{\line(1,0){3}}
%  \multiput(40,10)(5,0){24}{\line(1,0){3}}
%  \put(40,203){\makebox(120,20)[bc]{\gpart{head}}}
%  \put(40,40){\makebox(120,140)[c]{\gpart{body}}}
%  \put(40,11){\makebox(120,10)[c]{\gpart{foot}}}
%  \put(150,230){\vector(0,-1){35}}\put(150,30){\vector(0,-1){30}}
%  \put(150,195){\vector(0,1){35}}\put(150,0){\vector(0,1){30}}
%  \put(160,197){\makebox(0,30)[lc]{|top|}}
%  \put(160,0){\makebox(0,30)[lc]{|bottom|}}
%  \multiput(160,30)(5,0){24}{\line(1,0){2}}
%  \multiput(160,195)(5,0){24}{\line(1,0){2}}
%  \put(255,250){\makebox(120,0)[bl]
%      {\textbf{(b)}~|includehead| and |includefoot|}}%
%  \put(260,0){\framebox(170,230){}}
%  \put(260,230){\makebox(170,15)[r]{\gpart{paper}}}
%  \begingroup\thicklines
%  \put(280,30){\framebox(120,165){}}\endgroup
%  \put(310,152){\vector(0,1){25}}
%  \put(295,130){\makebox(0,20)[lc]{|textheight|}}
%  \put(310,130){\vector(0,-1){80}}
%  \multiput(280,184)(5,0){24}{\line(1,0){3}}
%  \multiput(280,177)(5,0){24}{\line(1,0){3}}
%  \multiput(280,50)(5,0){24}{\line(1,0){3}}
%  \put(280,184){\makebox(120,10)[c]{\gpart{head}}}
%  \put(280,40){\makebox(120,140)[c]{\gpart{body}}}
%  \put(400,140){\line(1,1){45}}
%  \put(437,187){\makebox(50,10)[l]{\gpart{total body}}}
%  \put(280,31){\makebox(120,10)[c]{\gpart{foot}}}
%  \put(370,230){\vector(0,-1){35}}\put(370,30){\vector(0,-1){30}}
%  \put(370,195){\vector(0,1){35}}\put(370,0){\vector(0,1){30}}
%  \put(380,197){\makebox(0,30)[lc]{|top|}}
%  \put(380,0){\makebox(0,30)[lc]{|bottom|}}
%  \end{picture}}
%  \caption[An effect of \texttt{includehead} and \texttt{includefoot}.]{%
%  \begin{minipage}[t]{.8\textwidth}\raggedright\small
%    |includehead| and |includefoot| include the head and foot respectively
%    into \gpart{total body}. \textbf{(a)} |height| $=$ |textheight| (default).
%    \textbf{(b)} |height| $=$ |textheight| $+$ |headheight| $+$ |headsep| $+$ 
%    |footskip| if |includehead| and |includefoot|. If the top and bottom
%    margins are specified, |includehead| and |includefoot| result in
%    shorter |textheight|.
%  \end{minipage}}
%  \label{fig:includes}
% \end{figure}
%
% Thus, the page layout consists of three parts (lengths) in each
% direction: one body and two margins. If the two of them are explicitly
% specified, the other length is obvious and no need to be specified.
% Figure~\ref{fig:Labc} shows a simple model of page dimensions. 
% When a length |L| is given and is partitioned into the body |b|, the
% margins |a| and |c|, it's obvious that
% \begin{equation}
%   |L|=|a|+|b|+|c|  \label{eq:Labc}
% \end{equation}
% The specification with two of the three (|a|,|b| and |c|) fixed
% explicitly is solvable. If two or more are left unspecified
% or `underspecified', Equation~(\ref{eq:Labc}) cannot be solved
% without any other relation between them. If all of them are
% specified, then it needs to check whether or not they
% satisfy Equation~(\ref{eq:Labc}), that is too much specification or
% `overspecified'.
% \begin{figure}
%  \centering
%  {\unitlength=0.8pt
%  \begin{picture}(300,60)(0,-5)
%  \begingroup\linethickness{5pt}
%  \put(0,5){\textcolor{green}{\line(1,0){60}}}
%  \put(60,5){\textcolor{black}{\line(1,0){160}}}
%  \put(220,5){\textcolor{green}{\line(1,0){80}}}
%  \endgroup
%  \put(0,15){\makebox(60,10)[b]{|a|}}
%  \put(60,0){\line(0,1){20}}
%  \put(60,15){\makebox(160,10)[b]{|b|}}
%  \put(220,0){\line(0,1){20}}
%  \put(220,15){\makebox(80,10)[b]{|c|}}
%  \put(0,0){\line(0,1){50}}
%  \put(150,35){\vector(-1,0){150}}
%  \put(0,40){\makebox(300,10){|L|}}
%  \put(150,35){\vector(1,0){150}}
%  \put(300,0){\line(0,1){50}}
%  \end{picture}}
%  \caption{A simple model of page dimensions.}
%  \label{fig:Labc}
% \end{figure}
%
% The \Gm\ package has auto-completion mechanism that saves the
% trouble of specifying the page layout dimensions. For example,
% you can set
% \begin{quote}
%  |\usepackage[width=14cm, left=3cm]{geometry}|
% \end{quote}
% on A4 paper. In this case you don't have to set the right margin
% The details of auto-completion will be described in
% Section~\ref{sec:rules}.
%
% \section{User interface}
%
% \subsection{Commands}
%
% The \Gm\ package provides the following commands:
% \begin{itemize}\setlength{\itemsep}{-.5\parsep}
%  \item |\geometry{|\meta{options}|}|
%  \item |\newgeometry{|\meta{options}|}| and |\restoregeometry|
%  \item |\savegeometry{|\meta{name}|}| and |\loadgeometry{|\meta{name}|}|
% \end{itemize}
%
% |\geometry{|\meta{options}|}|
% changes the page layout according to the options specified in the
% argument. This command, if any, should be placed only in the
% preamble (before |\begin{document}|).
% 
% The \Gm\ package may be used as part of a class or another package
% you use in your document. The command \cs{geometry} can overwrite
% some of the settings in the preamble. Multiple use of \cs{geometry}
% is allowed and then processed with the options concatenated.
% If \Gm\ is not yet loaded, you can use only
% |\usepackage[|\meta{options}|]{geometry}| instead of \cs{geometry}.
%
% \medskip
% |\newgeometry{|\meta{options}|}|
% changes the page layout mid-document. \cs{newgeometry} is almost
% similar to \cs{geometry} except that \cs{newgeometry} disables all
% the options specified by \cs{usepackage} and \cs{geometry} in
% the preamble and skips papersize-related options. 
% \cs{restoregeometry}
% restores the page layout specified in the preamble. This command
% has no arguments. See Section~\ref{sec:midchange} for details.
%
% \medskip
% |\savegeometry{|\meta{name}|}|
% saves the page dimensions as \meta{name} where you put
% this command.
% |\loadgeometry{|\meta{name}|}|
% loads the page dimensions saved as \meta{name}. See
% Section~\ref{sec:midchange} for details.
%
% \subsection{Optional argument}
%
% The \Gm\ package adopts \textsf{keyval} interface
% `\meta{key}=\meta{value}' for the optional argument to
% \cs{usepackage}, \cs{geometry} and \cs{newgeometry}.
% 
% The argument includes a list of comma-separated \textsf{keyval}
% options and has basic rules as follows:
% \begin{itemize}\setlength{\itemsep}{-.5\parsep}
% \item Multiple lines are allowed, while blank lines are not.
% \item Any spaces between words are ignored.
% \item Options are basically order-independent.
% (There are some exceptions. See Section~\ref{sec:optionorder} for details.)
% \end{itemize}
%  For example,
% \begin{quote}
% |\usepackage[ a5paper ,  hmargin = { 3cm,|\\
% |                .8in } , height|\\
% |         =  10in ]{geometry}|
% \end{quote}
% is equivalent to 
% \begin{quote}
%   |\usepackage[height=10in,a5paper,hmargin={3cm,0.8in}]{geometry}|
% \end{quote}
% Some options are allowed to have sub-list, e.g. |{3cm,0.8in}|.
% Note that the order of values in the sub-list is significant.
% The above setting is also equivalent to the followings:
% \begin{quote}
%   |\usepackage{geometry}|\\
%   |\geometry{height=10in,a5paper,hmargin={3cm,0.8in}}|
% \end{quote}
% or 
% \begin{quote}
%   |\usepackage[a5paper]{geometry}|\\
%   |\geometry{hmargin={3cm,0.8in},height=8in}|\\
%   |\geometry{height=10in}|.
% \end{quote}
% Thus, multiple use of \cs{geometry} just appends options.
%
% \Gm\ supports package 
% \textsl{calc}\footnote{CTAN:~\texttt{macros/latex/required/tools}}.
% For example,
% \begin{quote}
%   |\usepackage{calc}|\\
%   |\usepackage[textheight=20\baselineskip+10pt]{geometry}|
% \end{quote}
%
% \subsection{Option types}
% \Gm\ options are categorized into four types:
%
% \begin{enumerate}\itemsep=0pt
% \item \textbf{Boolean type}
%
%    takes a boolean value (|true| or |false|). If no value,
%    |true| is set by default.
%    \begin{quote}
%       \meta{key}|=true|\OR|false|.\\
%       \meta{key} with no value is equivalent to 
%       \meta{key}|=true|.
%    \end{quote}
%    \textit{Examples:}~ |verbose=true|, |includehead|, 
%    |twoside=false|.\\
%    Paper name is the exception. The preferred paper name should be set
%    with no values. Whatever value is given, it is ignored. For
%    instance, |a4paper=XXX| is equivalent to |a4paper|.
%
% \item \textbf{Single-valued type}
%
%    takes a mandatory value.
%    \begin{quote}
%    \meta{key}|=|\meta{value}.
%    \end{quote}
%    \textit{Examples:}~ |width=7in|, |left=1.25in|,
%    |footskip=1cm|, |height=.86\paperheight|.
%
% \item \textbf{Double-valued type}
%
%    takes a pair of comma-separated values in braces. The two values can
%    be shortened to one value if they are identical.
%    \begin{quote}
%    \meta{key}|=|\argii{value1}{value2}.\\
%    \meta{key}|=|\meta{value} is equivalent to 
%              \meta{key}|=|\argii{value}{value}.
%    \end{quote}
%    \textit{Examples:}~ |hmargin={1.5in,1in}|, |scale=0.8|,
%    |body={7in,10in}|.
%
% \item \textbf{Triple-valued type}
%
%    takes three mandatory, comma-separated values in braces.
%    \begin{quote}
%    \meta{key}|=|\argiii{value1}{value2}{value3}
%    \end{quote}
%    Each value must be a dimension or null. When you give an empty value
%    or `|*|', it means null and leaves the appropriate value 
%    to the auto-completion mechanism. You need to specify at least one
%    dimension, typically two dimensions. You can set nulls for all the 
%    values, but it makes no sense.
%    \textit{Examples:}\\
%    \hspace*{2em} |hdivide={2cm,*,1cm}|, |vdivide={3cm,19cm, }|,
%                   |divide={1in,*,1in}|.
% \end{enumerate}
%
% \section{Option details}
%
% This section describes all the options available in \Gm.
% Options with a dagger $^\dagger$ are not available 
% as a argument of \cs{newgeometry} (See Section~\ref{sec:midchange}).
%
% \subsection{Paper size}\label{sec:paper}
% 
% The options below set paper/media size and orientation.
% \begin{Options}
% \item[\onlypre paper\OR papername] ~\\ 
%  specifies the paper size by name. |paper=|\meta{paper-name}.
%  For convenience, you can specify the paper name without |paper=|.
%  For example, |a4paper| is equivalent to |paper=a4paper|.
% \item[\onlypre \vtop{
%  \hbox{a0paper, a1paper, a2paper, a3paper, a4paper, a5paper, a6paper,}
%  \hbox{b0paper, b1paper, b2paper, b3paper, b4paper, b5paper, b6paper,}
%  \hbox{b0j, b1j, b2j, b3j, b4j, b5j, b6j,}
%  \hbox{ansiapaper, ansibpaper, ansicpaper, ansidpaper, ansiepaper,}
%  \hbox{letterpaper, executivepaper, legalpaper}}]~\\[1ex] 
%    specifies paper name.  The value part is ignored even if any.
%    For example, the followings have the same effect:
%    |a5paper|, |a5paper=true|, |a5paper=false| and so forth.
%   |a[0-6]paper| and |b[0-6]paper| are ISO A and B series of paper sizes.
%   The JIS (Japanese Industrial Standards) A-series is identical to the ISO A-series,
%   but the JIS B-series is different from the ISO B-series.
%   |b[0-6]j| should be used for the JIS B-series. 
% \item[\onlypre screen] a special paper size with (W,H) = (225mm,180mm).
%    For presentation with PC and video projector, ``|screen,centering|''
%    with `slide' documentclass would be useful.
% \item[\onlypre paperwidth] width of the paper. |paperwidth=|\meta{length}.
% \item[\onlypre paperheight] height of the paper. |paperheight=|\meta{length}.
% \item[\onlypre papersize] width and height of the paper. 
%    |papersize=|\argii{width}{height} or |papersize=|\meta{length}.
% \item[\onlypre landscape] switches the paper orientation to landscape mode.
% \item[\onlypre portrait] switches the paper orientation to portrait mode.
%    This is equivalent to |landscape=false|.
% \end{Options}
%
% The options for paper names (e.g., |a4paper|) and orientation
% (|portrait| and |landscape|) can be set as document class options. 
% For example, you can set |\documentclass[a4paper,landscape]{article}|, 
% then |a4paper| and |landscape| are processed in \Gm\ as well.
% This is also the case for |twoside| and |twocolumn|
% (see also Section~\ref{sec:dimension}).
%
% \subsection{Layout size}
%
%  You can specify the layout area with options described in this
%  section regardless of the paper size.
%  The options would help to print the specified layout to a different
%  sized paper.  For example, with |a4paper| and |layout=a5paper|, the
%  package uses `A5' layout to calculate margins on 'A4' paper.
%  The layout size defaults to the same as the paper.
%  The options for the layout size are available in \cs{newgeometry},
%  so that you can change the layout size in the middle of the document.
%  The paper size itself can't be changed though.
%  Figure~\ref{fig:layoutandpaper} shows what the difference between
%  |layout| and |paper| is.
% \begin{Options}
% \item[layout] specifies the layout size by paper
% name. |layout=|\meta{paper-name}. All th paper names defined in \Gm\
% are available. See Section~\ref{sec:paper} for details.
% \item[layoutwidth] width of the layout. |layoutwidth=|\meta{length}.
% \item[layoutheight] height of the layout. |layoutheight=|\meta{length}.
% \item[layoutsize] width and height of the layout.
%    |layoutsize=|\argii{width}{height} or |layoutsize=|\meta{length}.
% \item[layouthoffset] specifies the horizontal offset from the left edge of
% the paper. |layouthoffset=|\meta{length}.
% \item[layoutvoffset] specifies the vertical offset from the top edge of
% the paper. |layoutvoffset=|\meta{length}.
% \item[layoutoffset] specifies both horizontal and vertical offsets. 
%  |layoutoffset=|\argii{hoffset}{voffset} or |layoutsize=|\meta{length}.
% \end{Options}
% \begin{figure}
%  \centering\small
%  {\unitlength=.6pt
%  \begin{picture}(450,250)(0,-10)
%  \put(20,0){\makebox(168,12)[r]{\gpart{paper}}}
%  \put(20,0){\framebox(170,230){}}
%  \put(21,40){\dashbox{3}(140,189){}}
%  \put(21,28){\makebox(140,12)[r]{\gpart{layout}}}
%  \put(40,50){\makebox(100,10){\gpart{foot}}}
%  \put(40,50){\line(1,0){100}}
%  \put(40,65){\framebox(100,125){\gpart{body}}}
%  \put(40,200){\framebox(100,10){\gpart{head}}}
%  \put(20,230){\makebox(140,20){|layoutwidth|}}
%  \put(40,240){\vector(-1,0){20}}
%  \put(140,240){\vector(1,0){20}}
%  \put(10,145){\vector(0,1){85}}
%  \put(15,125){\makebox(0,20)[r]{|layoutwidth|}}
%  \put(10,125){\vector(0,-1){85}}
%  \put(280,0){\makebox(168,12)[r]{\gpart{paper}}}
%  \put(280,0){\framebox(170,230){}}
%  \put(293,35){\dashbox{3}(140,189){}}
%  \put(293,23){\makebox(140,12)[r]{\gpart{layout}}}
%  \put(312,45){\makebox(100,10){\gpart{foot}}}
%  \put(312,45){\line(1,0){100}}
%  \put(312,60){\framebox(100,125){\gpart{body}}}
%  \put(312,195){\framebox(100,10){\gpart{head}}}
%  \put(235,230){\makebox(80,20)[l]{|layouthoffset|}}
%  \put(260,210){\vector(1,0){20}}
%  \put(308,210){\vector(-1,0){15}}
%  \put(260,210){\line(-1,2){10}}
%  \put(355,230){\makebox(100,20){|layoutvoffset|}}
%  \put(350,250){\vector(0,-1){20}}
%  \put(350,209){\vector(0,1){15}}
%  \end{picture}}
%  \caption[layout and paper]{%
%  \begin{minipage}[t]{.7\textwidth}\raggedright\small
%  The dimensions related to the layout size. Note that the layout size
%  defaults to the same size as the paper, so you don't have to specify
%  layout-related options explicitly in most cases.
%  \end{minipage}}
%  \label{fig:layoutandpaper}
% \end{figure}
% 
% \subsection{Body size}\label{sec:body}
%
% The options specifying the size of \gpart{total body} are described in this
% section.
%
% \begin{Options}
% \item[hscale]
%    ratio of width of \gpart{total body} to \cs{paperwidth}. 
%    |hscale=|\meta{h-scale}, e.g., |hscale=0.8| is equivalent to
%    |width=0.8|\cs{paperwidth}. (|0.7| by default)
% \item[vscale]
%    ratio of height of \gpart{total body} to \cs{paperheight}, e.g.,
%    |vscale=|\meta{v-scale}. (|0.7| by default) |vscale=0.9| is equivalent
%    to |height=0.9|\cs{paperheight}.
% \item[scale] ratio of \gpart{total body} to the paper.
%    |scale=|\argii{h-scale}{v-scale} or |scale=|\meta{scale}.
%    (|0.7| by default)
% \item[width\OR totalwidth] ~\\
%    width of \gpart{total body}. |width=|\meta{length} or
%    |totalwidth=|\meta{length}. This dimension defaults to |textwidth|,
%    but if |includemp| is set to |true|, |width| $\ge$ |textwidth| 
%    because |width| includes the width of the marginal notes.
%    If |textwidth| and |width| are specified at the same time, 
%    |textwidth| takes priority over |width|.
% \item[height\OR totalheight] ~\\
%    height of \gpart{total body}, excluding header and footer by default.
%    If |includehead| or |includefoot| is set, |height| includes
%    the head or foot of the page as well as |textheight|.
%    |height=|\meta{length} or |totalheight=|\meta{length}. If both
%    |textheight| and |height| are specified, |height| will be ignored.
% \item[total] width and height of \gpart{total body}.\\
%    |total=|\argii{width}{height} or |total=|\meta{length}.
% \item[textwidth] specifies \cs{textwidth}, the width of \gpart{body} 
%    (the text area). |textwidth=|\meta{length}.
% \item[textheight] specifies \cs{textheight}, the height of
%    \gpart{body} (the text area). |textheight=|\meta{length}.
% \item[text\OR body] specifies both \cs{textwidth} and \cs{textheight}
%    of the body of page. |body=|\argii{width}{height} or
%    |text=|\meta{length}.
% \item[lines] enables users to specify \cs{textheight} by the number
%    of lines. |lines|=\meta{integer}.
% \item[includehead] includes the head of the page, \cs{headheight}
%    and \cs{headsep}, into \gpart{total body}. It is set to |false| by
%    default. It is opposite to |ignorehead|. See
%    Figure~\ref{fig:includes} and Figure~\ref{fig:modes}.
% \item[includefoot] includes the foot of the page, \cs{footskip},
%    into \gpart{total body}. It is opposite to |ignorefoot|.
%    It is |false| by default. See Figure~\ref{fig:includes} and
%    Figure~\ref{fig:modes}.
% \item[includeheadfoot]~\\ 
%    sets both |includehead| and |includefoot| to |true|, which is opposite
%    to |ignoreheadfoot|. See Figure~\ref{fig:includes} and
%    Figure~\ref{fig:modes}.
% \item[includemp] includes the margin notes,  \cs{marginparwidth}
%    and \cs{marginparsep}, into \gpart{body} when calculating horizontal
%    calculation.
% \item[includeall] sets both |includeheadfoot| and |includemp| to
%    |true|. See Figure~\ref{fig:modes}.
% \item[ignorehead] disregards the head of the page,
%    |headheight| and |headsep|, in determining vertical layout, but does not
%    change those lengths. It is equivalent to |includehead=false|. It is set
%    to |true| by default. See also |includehead|.
% \item[ignorefoot] disregards the foot of page, |footskip|,
%    in determining vertical layout, but does not change that length.
%    This option defaults to |true|. See also |includefoot|.
% \item[ignoreheadfoot]~\\ sets both |ignorehead| and |ignorefoot|
%    to |true|. See also |includeheadfoot|.
% \item[ignoremp] disregards the marginal notes in determining the
%    horizontal margins (defaults to |true|). If marginal notes overrun
%    the page, the warning message will be displayed when |verbose=true|.
%    See also |includemp| and Figure~\ref{fig:modes}.
% \item[ignoreall] sets both |ignoreheadfoot| and |ignoremp| to |true|. 
%    See also |includeall|.
% \item[heightrounded]~\\
%    This option rounds \cs{textheight} to \textit{n}-times (\textit{n}:
%    an integer) of \cs{baselineskip} plus \cs{topskip} to avoid 
%    ``underfull vbox'' in some cases. For example, if \cs{textheight} is
%    486pt with \cs{baselineskip} 12pt and \cs{topskip} 10pt, then
%    \begin{quote}
%      $(39\times12\textrm{pt}+10\textrm{pt}=)\: 478\textrm{pt}
%       < 486\textrm{pt} < 
%      490\textrm{pt} \:(=40\times12\textrm{pt}+10\textrm{pt})$,
%    \end{quote}
%    as a result \cs{textheight} is rounded to 490pt. |heightrounded=false|
%    by default.
% \end{Options}
%
% Figure~\ref{fig:modes} illustrates various layouts with different layout
% modes. The dimensions for a header and a footer can be controlled by
% |nohead| or |nofoot| mode, which sets each length to 0pt directly.
% On the other hand, options with the prefix |ignore| do \textit{not}
% change the corresponding native dimensions.
% \begin{figure}
%  \centering\small
%  {\unitlength=.65pt
%  \begin{picture}(460,525)(0,0)
%  \put( 20,310){\framebox(120,170){}}
%  \put( 20,507){\makebox(120,0)[bl]%
%  {\textbf{(a)}~|includeheadfoot|}}
%  \put( 20,460){\line(1,0){120}}\put( 20,450){\line(1,0){120}}
%  \put( 20,330){\line(1,0){120}}
%  \put( 20,485){\makebox(120,0)[br]{\gpart{total body}}}
%  \put( 20,335){\makebox(120,0)[bc]{|textwidth|}}
%  \put(150,470){\makebox(0,0)[l]{|headheight|}}
%  \put(150,450){\makebox(0,0)[l]{|headsep|}}
%  \put(150,390){\makebox(0,0)[l]{|textheight|}}
%  \put(150,320){\makebox(0,0)[l]{|footskip|}}
%  \put( 10,460){\makebox(120,20)[bc]{\gpart{head}}}
%  \put( 10,320){\makebox(120,140)[c]{\gpart{body}}}
%  \put( 10,310){\makebox(120,10)[c]{\gpart{foot}}}
%  \put(250,310){\framebox(120,170){}}
%  \put(250,507){\makebox(120,0)[bl]%
%  {\textbf{(b)}~|includeall|}}
%  \put(250,460){\line(1,0){95}}\put(250,450){\line(1,0){95}}
%  \put(250,330){\line(1,0){95}}\put(345,330){\line(0,1){120}}
%  \put(350,330){\line(0,1){120}}\put(350,450){\line(1,0){20}}
%  \put(350,330){\line(1,0){20}}
%  \put(250,485){\makebox(120,0)[br]{\gpart{total body}}}
%  \put(250,460){\makebox(95,20)[bc]{\gpart{head}}}
%  \put(250,320){\makebox(95,140)[c]{\gpart{body}}}
%  \put(385,390){\makebox(95,0)[cl]%
%  {\gpart{\shortstack[l]{marginal\\note}}}}
%  \put(250,310){\makebox(95,10)[c]{\gpart{foot}}}
%  \put(250,335){\makebox(95,0)[bc]{|textwidth|}}
%  \multiput(360, 390)(4,0){6}{\line(1,0){2}}
%  \multiput(348,333)(0,-4){12}{\line(0,1){2}}
%  \multiput(360,333)(0,-4){8}{\line(0,1){2}}
%  \put(355,292){\makebox(0,0)[bl]{|marginparwidth|}}
%  \put(345,275){\makebox(0,0)[bl]{|marginparsep|}}
%  \put( 20, 40){\framebox(120,170){}}
%  \put( 20,237){\makebox(120,0)[bl]%
%  {\textbf{(c)}~|includefoot|}}
%  \put( 20, 60){\line(1,0){120}}
%  \put( 20,215){\makebox(120,0)[br]{\gpart{total body}}}
%  \put(150,130){\makebox(0,0)[l]{|textheight|}}
%  \put(150, 50){\makebox(0,0)[l]{|footskip|}}
%  \put( 20, 50){\makebox(120,160)[c]{\gpart{body}}}
%  \put( 20, 40){\makebox(120,10)[c]{\gpart{foot}}}
%  \put( 20, 65){\makebox(120,10)[c]{|textwidth|}}
%  \put(250, 40){\framebox(120,170){}}
%  \put(250,237){\makebox(120,0)[bl]%
%  {\textbf{(d)}~|includefoot,includemp|}}
%  \put(250, 60){\line(1,0){95}}\put(350, 60){\line(1,0){20}}
%  \put(250,215){\makebox(120,0)[br]{\gpart{total body}}}
%  \put(250, 50){\makebox(95,160)[c]{\gpart{body}}}
%  \put(385,130){\makebox(95,0)[cl]%
%  {\gpart{\shortstack[l]{marginal\\note}}}}
%  \put(250, 40){\makebox(95,10)[c]{\gpart{foot}}}
%  \put(250, 65){\makebox(95,0)[bc]{|textwidth|}}
%  \put(345, 60){\line(0,1){150}}\put(350, 60){\line(0,1){150}}
%  \multiput(360, 130)(4,0){6}{\line(1,0){2}}
%  \multiput(348, 63)(0,-4){12}{\line(0,1){2}}
%  \multiput(360, 63)(0,-4){8}{\line(0,1){2}}
%  \put(355,22){\makebox(0,0)[bl]{|marginparwidth|}}
%  \put(345, 5){\makebox(0,0)[bl]{|marginparsep|}}
%  \end{picture}}
%  \caption[Sample layouts for \gpart{total body} with different 
%     layout modes]{%
%  \begin{minipage}[t]{.8\textwidth}\small
%    Sample layouts for \gpart{total body} with different switches.
%    (a) |includeheadfoot|, (b) |includeall|, (c) |includefoot|
%     and (d) |includefoot,includemp|. 
%    If |reversemp| is set to |true|, the location of the
%    marginal notes are swapped on every page.
%    Option |twoside| swaps both margins and marginal notes on verso pages.
%    Note that the marginal note, if any, is printed despite
%    |ignoremp| or |includemp=false| and overrun the page in some cases.
%  \end{minipage}}
%  \label{fig:modes}
% \end{figure}
%
% The following options can specify body and margins simultaneously with
% three comma-separated values in braces.
%
% \begin{Options}
% \item[hdivide] horizontal partitions (left,width,right).
%   |hdivide=|\argiii{left margin}{width}{right margin}. 
%   Note that you should not specify all of the three parameters.
%   The best way of using this option is to specify two of three and 
%   leave the rest with null(nothing) or `|*|'. For example, when you set
%   |hdivide={2cm,15cm, }|, the margin from the right-side edge of page
%   will be determined calculating |paperwidth-2cm-15cm|.
% \item[vdivide] vertical partitions (top,height,bottom).
%   |vdivide=|\argiii{top margin}{height}{bottom margin}.
% \item[divide] |divide=|\vargiii{$A$}{$B$}{$C$} is interpreted  as 
%   |hdivide=|\vargiii{$A$}{$B$}{$C$} and |vdivide=|\vargiii{$A$}{$B$}{$C$}.
% \end{Options}
%
% \subsection{Margin size}\label{sec:margin}
%
% The options specifying the size of the margins are listed below.
%
% \begin{Options}
% \item[left\OR lmargin\OR inner]~\\
%    left margin (for oneside) or inner margin (for twoside) of 
%    \gpart{total body}. In other words, the distance between the left (inner)
%    edge of the paper and that of \gpart{total body}. |left=|\meta{length}.
%    |inner| has no special meaning, just an alias of |left| and |lmargin|.
% \item[right\OR rmargin\OR outer]~\\ 
%    right or outer margin of \gpart{total body}. |right=|\meta{length}.
% \item[top\OR tmargin] top margin of the page. |top=|\meta{length}.
%    Note this option has nothing to do with the native dimension
%    \cs{topmargin}.
% \item[bottom\OR bmargin]~\\ 
%    bottom margin of the page. |bottom=|\meta{length}.
% \item[hmargin] left and right margin.
%   |hmargin=|\argii{left margin}{right margin} or |hmargin=|\meta{length}.
% \item[vmargin] top and bottom margin.
%   |vmargin=|\argii{top margin}{bottom margin} or |vmargin=|\meta{length}.
% \item[margin] |margin=|\vargii{$A$}{$B$} is equivalent to 
%   |hmargin=|\vargii{$A$}{$B$} and |vmargin=|\vargii{$A$}{$B$}.
%   |margin=|$A$ is automatically expanded to |hmargin=|$A$ and |vmargin=|$A$.
% \item[hmarginratio]
%   horizontal margin ratio of |left| (inner) to |right| (outer). 
%   The value of \meta{ratio} should be specified with colon-separated 
%   two values. Each value should be a positive integer less than 100
%   to prevent arithmetic overflow, e.g., |2:3| instead of |1:1.5|.
%   The default ratio is |1:1| for oneside, |2:3| for twoside.
% \item[vmarginratio]
%    vertical margin ratio of |top| to |bottom|. The default ratio is |2:3|.
% \item[marginratio\OR ratio]~\\
%    horizontal and vertical margin ratios.
%   |marginratio=|\argii{horizontal ratio}{vertical ratio} or
%   |marginratio=|\meta{ratio}.
% \item[hcentering] sets auto-centering horizontally and is
%   equivalent to |hmarginratio=1:1|. It is set to |true| by default for
%   oneside. See also |hmarginratio|.
% \item[vcentering] sets auto-centering vertically and is
%   equivalent to |vmarginratio=1:1|. The default is |false|.
%   See also |vmarginratio|.
% \item[centering] sets auto-centering and is equivalent to
%   |marginratio=1:1|. See also |marginratio|. The default is |false|.
%   See also |marginratio|.
% \item[twoside] switches on twoside mode with left and right margins swapped
%   on verso pages. The option sets \cs{@twoside} and \cs{@mparswitch} 
%   switches. See also |asymmetric|.
% \item[asymmetric] implements a twosided layout in which margins are
%   not swapped on alternate pages (by setting \cs{oddsidemargin} to 
%   \cs{evensidemargin} |+| |bindingoffset|) and in which the marginal notes
%   stay always on the same side. This option can be used as an alternative
%   to the twoside option. See also |twoside|.
% \item[bindingoffset]~\\ removes a specified space 
%   from the lefthand-side of the page for oneside or the inner-side for
%   twoside. |bindingoffset=|\meta{length}. This is useful if pages 
%   are bound by a press binding (glued, stitched, stapled \ldots).
%   See Figure~\ref{fig:bindingoffset}.
% \item[hdivide] See description in Section~\ref{sec:body}.
% \item[vdivide] See description in Section~\ref{sec:body}.
% \item[divide] See description in Section~\ref{sec:body}.
% \end{Options}
% \begin{figure}
%  \centering\small
%  {\unitlength=.65pt
%  \begin{picture}(500,270)(0,0)
%  \put(20,0){\framebox(170,230){}}
%  \put(20,255){\makebox(80,20)[l]{\textbf{a)}~every page for oneside or}}
%  \put(20,240){\makebox(80,20)[l]{\hspace{3ex}odd pages for twoside}}
%  \put(110,225){\makebox(80,20)[r]{\gpart{paper}}}
%  \put(55,37){\framebox(110,170)[tc]{\gpart{total body}}}
%  \multiput(38,0)(0,7){33}{\line(0,1){4}}
%  \put(38,100){\vector(1,0){17}}\put(55,100){\vector(-1,0){17}}
%  \put(60,95){\makebox(80,10)[l]{|left|}}
%  \put(60,80){\makebox(80,10)[l]{(|inner|)}}
%  \put(165,100){\vector(1,0){25}}\put(190,100){\vector(-1,0){25}}
%  \put(195,95){\makebox(80,10)[l]{|right|}}
%  \put(195,80){\makebox(80,10)[l]{(|outer|)}}
%  \put(20,16){\vector(1,0){18}}
%  \put(45,10){\makebox(80,10)[bl]{|bindingoffset|}}
%  \put(280,255){\makebox(80,20)[l]{\textbf{b)}~even (back) pages for twoside}}
%  \put(280,0){\framebox(170,230){}}
%  \put(370,225){\makebox(80,20)[r]{\gpart{paper}}}
%  \put(305,37){\framebox(110,170)[tc]{\gpart{total body}}}
%  \multiput(432,0)(0,7){33}{\line(0,1){4}}
%  \put(280,100){\vector(1,0){25}}\put(305,100){\vector(-1,0){25}}
%  \put(310,95){\makebox(80,10)[l]{|outer|}}
%  \put(310,80){\makebox(80,10)[l]{(|right|)}}
%  \put(415,100){\vector(1,0){17}}\put(432,100){\vector(-1,0){17}}
%  \put(373,95){\makebox(80,10)[l]{|inner|}}
%  \put(373,80){\makebox(80,10)[l]{(|left|)}}
%  \put(450,16){\vector(-1,0){18}}
%  \put(330,10){\makebox(80,10)[bl]{|bindingoffset|}}
%  \end{picture}}
%  \caption[\texttt{bindingoffset} option]{%
%   \begin{minipage}[t]{.8\textwidth}\raggedright\small
%   The option |bindingoffset| adds the specified length to the inner margin.
%   Note that |twoside| option swaps the horizontal margins and the
%   marginal notes together with |bindingoffset| on even pages (see
%   \textbf{b)}), but |asymmetric| option suppresses the swap of the
%   margins and marginal notes (but |bindingoffset| is still swapped).
%   \end{minipage}}
%  \label{fig:bindingoffset}
% \end{figure}
%
% \subsection{Native dimensions}\label{sec:dimension}
%
% The options below overwrite \LaTeX\ native dimensions and switches for page
% layout (See the right-hand side in Figure~\ref{fig:layout}).
%
% \begin{Options}
% \item[headheight\OR head]~\\
%    modifies \cs{headheight}, height of header.
%    |headheight=|\meta{length} or |head=|\meta{length}.
% \item[headsep] modifies \cs{headsep}, separation between header and text
%    (body). |headsep=|\meta{length}.
% \item[footskip\OR foot]~\\ modifies \cs{footskip}, distance separation
%    between baseline of last line of text and baseline of footer.
%    |footskip=|\meta{length} or |foot=|\meta{length}.
% \item[nohead] eliminates spaces for the head of the page, which is
%    equivalent to both \cs{headheight}|=0pt| and \cs{headsep}|=0pt|.
% \item[nofoot] eliminates spaces for the foot of the page, which is
%    equivalent to \cs{footskip}|=0pt|.
% \item[noheadfoot] equivalent to |nohead| and |nofoot|, which means that
%    \cs{headheight}, \cs{headsep} and \cs{footskip} are all set to |0pt|.
% \item[footnotesep] changes the dimension \cs{skip}\cs{footins}, separation
%    between the bottom of text body and the top of footnote text.
% \item[marginparwidth\OR marginpar]~\\ 
%    modifies \cs{marginparwidth}, width of the marginal notes.
%    |marginparwidth=|\meta{length}.
% \item[marginparsep] modifies \cs{marginparsep}, separation between
%    body and marginal notes. |marginparsep=|\meta{length}.
% \item[nomarginpar] shrinks spaces for marginal notes to 0pt, which
%    is equivalent to \cs{marginparwidth}|=0pt| and \cs{marginparsep}|=0pt|.
% \item[columnsep] modifies \cs{columnsep}, the separation between two
%    columns in |twocolumn| mode.
% \item[hoffset]  modifies \cs{hoffset}. |hoffset=|\meta{length}.
% \item[voffset]  modifies \cs{voffset}. |voffset=|\meta{length}.
% \item[offset] horizontal and vertical offset.\\
%    |offset=|\argii{hoffset}{voffset} or |offset=|\meta{length}.
% \item[twocolumn] sets |twocolumn| mode with \cs{@twocolumntrue}.
%   |twocolumn=false| denotes onecolumn mode with\cs{@twocolumnfalse}.
% \item[twoside] sets both \cs{@twosidetrue} and \cs{@mparswitchtrue}.
%   See Section~\ref{sec:margin}.
% \item[textwidth] sets \cs{textwidth} directly. See Section~\ref{sec:body}.
% \item[textheight] sets \cs{textheight} directly. See Section~\ref{sec:body}.
% \item[reversemp\OR reversemarginpar]~\\
%   makes the marginal notes appear in the left (inner) margin with
%   \cs{@reversemargintrue}. The option doesn't change |includemp| mode.
%   It's set |false| by default.
% \end{Options}
%
% \subsection{Drivers}\label{sec:drivers}
% 
% The package supports drivers |dvips|, |dvipdfm|, |pdftex|, |xetex| and
% |vtex|. You can also set |dvipdfm| for \textsf{dvipdfmx} and
% \textsf{xdvipdfmx}. |pdftex| for \textsf{pdflatex}, and |vtex| for
% V\TeX{} environment.
% The driver options are exclusive. The driver can be set by either
% |driver=|\meta{driver name} or any of the drivers directly like |pdftex|.
% By default, \Gm\ guesses the driver appropriate to the system
% in use. Therefore, you don't have to set a driver in most cases.
% However, if you want to use |dvipdfm|, you should specify it explicitly.
%
% \begin{Options}
% \item[\onlypre driver] specifies the driver with |driver=|\meta{driver name}. 
% |dvips|, |dvipdfm|, |pdftex|, |vtex|, |xetex|, |auto| and |none| are
% available as a driver name. The names except for |auto| and |none| can
% be specified directly with the name without |driver=|.
% |driver=auto| makes the auto-detection work whatever the previous setting is. 
% |driver=none| disables the auto-detection and sets no driver, which
% may be useful when you want to let other package work out the driver
% setting. For example, if you want to use \textsf{crop} package with \Gm,
% you should call |\usepackage[driver=none]{geometry}| before
% the \textsf{crop} package.
% \item[\onlypre dvips] writes the paper size in dvi output with the \cs{special}
%     macro. If you use \textsl{dvips} as a DVI-to-PS driver,
%     for example, to print a document with |\geometry{a3paper,landscape}|
%     on A3 paper in landscape orientation, you don't need options
%     ``|-t a3 -t landscape|'' to \textsl{dvips}. 
% \item[\onlypre dvipdfm] works like |dvips| except for landscape correction.
%      You can set this option when using \textsf{dvipdfmx} and
%      \textsf{xdvipdfmx} to process the dvi output.
% \item[\onlypre pdftex] sets \cs{pdfpagewidth} and \cs{pdfpageheight}
%      internally.
% \item[\onlypre xetex] is the same as |pdftex| except for ignoring
%     |\pdf{h,v}origin| undefined in XeLaTeX. This option is introduced in
%     the version 5. Note that `geometry.cfg' in TeXLive, which disables the
%     auto-detection routine and sets |pdftex|, is no longer necessary,
%     but has no problem even though it's left undeleted.
%     Instead of |xetex|, you can specify |dvipdfm| with XeLaTeX
%     if you want to use specials of dvipdfm XeTeX supports.
% \item[\onlypre vtex] sets dimensions \cs{mediawidth} and \cs{mediaheight}
%     for V\TeX. When this driver is selected (explicitly or
%     automatically), \Gm\ will auto-detect which output mode
%     (DVI, PDF or PS) is selected in V\TeX, and do proper
%     settings for it.
% \end{Options}
% If explicit driver setting is mismatched with the typesetting program
% in use, the default driver |dvips| would be selected.
%
% \subsection{Other options}
%
%  The other useful options are described here.
%
% \begin{Options}
% \item[\onlypre verbose] displays the parameter results on the terminal.
%   |verbose=false| (default) still puts them into the log file.
% \item[\onlypre reset] sets back the layout dimensions and switches to the
%   settings before \Gm\ is loaded. Options given in 
%   |geometry.cfg| are also cleared.
%   Note that this cannot reset |pass| and |mag| with |truedimen|.
%   |reset=false| has no effect and cannot cancel the previous
%   |reset|(|=true|) if any. For example, when you go
%   \begin{quote}
%     |\documentclass[landscape]{article}|\\
%     |\usepackage[twoside,reset,left=2cm]{geometry}|
%   \end{quote}
%   with |\ExecuteOptions{scale=0.9}| in |geometry.cfg|,
%   then as a result, |landscape| and |left=2cm| remain effective,
%   and |scale=0.9| and |twoside| are ineffective.
% \item[\onlypre mag] sets magnification value (\cs{mag}) and automatically modifies 
%   \cs{hoffset} and \cs{voffset} according to the magnification.
%   |mag=|\meta{value}. Note that \meta{value} should be an integer value
%   with 1000 as a normal size. For example, |mag=1414| with |a4paper|
%   provides an enlarged print fitting in |a3paper|, which is $1.414$
%   (=$\sqrt{2}$) times larger than |a4paper|. Font enlargement needs extra
%   disk space. \textbf{Note that setting |mag| should precede any other
%   settings with `true' dimensions, such as  |1.5truein|, |2truecm|
%   and so on.} See also |truedimen| option.
% \item[\onlypre truedimen] changes all internal explicit dimension values into 
%   \textit{true} dimensions, e.g., |1in| is changed to |1truein|.
%   Typically this option will be used together with |mag| option. Note that
%   this is ineffective against externally specified dimensions. For example,
%   when you set ``\texttt{mag=1440, margin=10pt, truedimen}'', margins are
%   not `true' but magnified. If you want to set exact margins, you should
%   set like ``\texttt{mag=1440, margin=10truept, truedimen}'' instead.
% \item[\onlypre pass] disables all of the geometry options and calculations
%   except |verbose| and |showframe|. It can be used for checking
%   out the page layout of the documentclass, other packages and manual
%   settings without \Gm.
% \item[\onlypre showframe] shows visible frames for the text area and page,
%   and the lines for the head and foot on the first page.
% \end{Options}
%
% \section{Processing options}\label{sec:process}
% 
% \subsection{Order of loading}\label{sec:loadorder}
%
% If there's |geometry.cfg| somewhere \TeX{} can find it, \Gm\ loads
% it first. For example, in |geometry.cfg| you may write
% |\ExecuteOptions{a4paper}|, which specifies A4 paper as the default
% paper. Basically you can use all the options defined in \Gm\ with
% |\ExecuteOptions{}|.
% 
% The order of loading in the preamble of your document is as follows:
% \begin{enumerate}
%  \item |geometry.cfg| if it exists.
%  \item Options specified with |\documentclass[|\meta{options}|]{...}|.
%  \item Options specified with |\usepackage[|\meta{options}|]{geometry}|
%  \item Options specified with |\geometry{|\meta{options}|}|, which
%  can be called multiple times. (|reset| option will cancel the
%  specified options ever given in  |\usepackage{geometry}| or
%  |\geometry|.)
% \end{enumerate}
%
% \subsection{Order of options}\label{sec:optionorder}
%
% The specification of \Gm\ options is order-independent,
% and overwrites the previous one for the same setting.
% For example, 
% \begin{center}
% |[left=2cm, right=3cm]| is equivalent to 
% |[right=3cm, left=2cm]|.
% \end{center}
% The options called multiple times overwrite the previous
% settings. For example, 
% \begin{center}
%  |[verbose=true, verbose=false]| results in |verbose=false|. 
% \end{center}
% |[hmargin={3cm,2cm}, left=1cm]| is the same as |hmargin={1cm,2cm}|, 
% where the left (or inner) margin is overwritten by |left=1cm|. 
%
% |reset| and |mag| are exceptions.
% The |reset| option removes all the geometry options (except |pass|)
% before it. If you set
% \begin{quote}
% |\documentclass[landscape]{article}|\\
% |\usepackage[margin=1cm,twoside]{geometry}|\\
% |\geometry{a5paper, reset, left=2cm}|
% \end{quote}
% then |margin=1cm|, |twoside| and |a5paper| are removed, and 
% is eventually equivalent to
% \begin{quote}
% |\documentclass[landscape]{article}|\\
% |\usepackage[left=2cm]{geometry}|
% \end{quote}
%
% The |mag| option should be set in advance of any other settings with
% `true' length, such as |left=1.5truecm|, |width=5truein| and so on.
% The |\mag| primitive can be set before this package is called.
%
% \subsection{Priority}\label{sec:priority}
%  
% There are several ways to set dimensions of the \gpart{body}:
% |scale|, |total|, |text| and |lines|. The \Gm\ package gives higer
% priority to the more concrete specificaion. Here is the priority
% rule for \gpart{body}.
% \[\begin{array}{c}
% \textrm{priority:}\qquad\textrm{low}\quad
%    \longrightarrow\quad\textrm{high}\\[1em]
% \left\{\begin{array}{l}|hscale|\\|vscale|\\|scale|
%        \end{array}\right\} <
% \left\{\begin{array}{l}|width|\\|height|\\|total|
%        \end{array}\right\} <
% \left\{\begin{array}{l}|textwidth|\\|textheight|
%         \\|text|\end{array}\right\} < |lines|.
% \end{array}\]
% For example, 
% \begin{quote}
%  |\usepackage[hscale=0.8, textwidth=7in, width=18cm]{geometry}|
% \end{quote}
% is the same as |\usepackage[textwidth=7in]{geometry}|. Another example:
% \begin{quote}
%  |\usepackage[lines=30, scale=0.8, text=7in]{geometry}|
% \end{quote}
% results in \texttt{[lines=30, textwidth=7in]}.
%
% \subsection{Defaults}\label{sec:defaults}
%
%　This section sums up the default settings for the auto-completion
%　described later.
% 
% The default vertical margin ratio is $2/3$, namely,
% \begin{equation}
%  |top| : |bottom| = 2 : 3 \qquad\textit{default}.
% \end{equation}
% As for the horizontal margin ratio, the default value depends on
% whether the document is onesided or twosided,
% \begin{equation}
%  |left|\;(|inner|) : |right|\;(|outer|) 
%       = \left\{ \begin{array}{ll}
%              1 : 1 \qquad\textit{default for oneside},\\
%              2 : 3 \qquad\textit{default for twoside}.
%         \end{array}\right.
% \end{equation}
% Obviously the default horizontal margin ratio for oneside is `centering'.
%
% The \Gm\ package has the following default setting for
% \textit{onesided} documents:
% \begin{itemize}\setlength{\itemsep}{-.5\parsep}
%   \item |scale=0.7| (\gpart{body} is $0.7 \times \gpart{paper}$)
%   \item |marginratio={1:1, 2:3}| (1:1 for horizontal and 2:3 for vertical margins)
%   \item |ignoreall| (the header, footer, marginal notes are excluded
%   when calculating the size of \gpart{body}.)
% \end{itemize}
% For \textit{twosided} document with |twoside| option, the default
% setting is the same as \textit{onesided} except that the horizontal
% margin ratio is set |2:3| as well.
%
% Additional options overwrite the previous specified dimensions. 
%
% \subsection{Auto-completion} \label{sec:rules}
%
% Figure~\ref{fig:specrule} shows schematically how many specification
% patterns exist and how to solve the ambiguity of the
% specifications. Each axis shows the numbers of lengths
% explicitly specified for body and margins. \Ss(m,b) presents the
% specification with a set of numbers (margin,body)=(m,b).
%
% For example, the specification |width=14cm, left=3cm| is categorized
% into \Ss(1,1), which is an adequate specification. If you add
% |right=4cm|, it would be in \Ss(2,1) and overspecified. 
% if only |width=14cm|, it's in \Ss(0,1), underspecified. 
%
% The \Gm\ package has the auto-completion mechanism, in which
% if the layout parameters are underspecified or overspecified,
% \Gm\ works out the ambiguity using the defaults and other
% relations. Here are the specifications and the completion rules.
%
% \begin{figure}
%  \centering
%  {\unitlength=1pt
%  \begin{picture}(400,150)(40,0)
%  \put(1,49){\makebox(90,49)[r]{\large 0}}
%  \put(1,1){\makebox(70,99)[r]{\large body}}
%  \put(1,1){\makebox(90,49)[r]{\large 1}}
%  \put(100,100){\makebox(99,20){\large 0}}
%  \put(100,50){\framebox(99,49){}}
%  \put(100,80){\makebox(99,15){\Ss(0,0)}}
%  \put(100,50){\makebox(99,49){use |scale|}}
%  {\linethickness{1pt}%
%  \put(150,35){\line(0,1){30}}
%  \put(150,35){\line(-1,3){4}}
%  \put(150,35){\line(1,3){4}}}
%  \put(100,0){\framebox(99,49){}}
%  \put(100,2){\makebox(99,15){\Ss(0,1)}}
%  \put(100,0){\makebox(99,49){use |marginratio|}}
%  \put(200,120){\makebox(99,12){\large margin}}
%  \put(200,100){\makebox(99,20){\large 1}}
%  \put(200,50){\framebox(99,49){use |scale|}}
%  \put(200,55){\makebox(89,10)[r]{\scriptsize\shortstack[l]{if |ratio|\\specified}}}
%  \put(200,2){\makebox(99,15){\Ss(1,1)}}
%  {\linethickness{1pt}%
%  \put(250,35){\line(0,1){30}}
%  \put(250,35){\line(-1,3){4}}
%  \put(250,35){\line(1,3){4}}}
%  {\linethickness{1pt}%
%  \put(225,25){\line(-1,0){35}}
%  \put(225,25){\line(-3,-1){12}}
%  \put(225,25){\line(-3,1){12}}}
%  \put(200,80){\makebox(99,15){\Ss(1,0)}}
%  \put(200,0){\framebox(99,49){\textcolor{red}{\textsl{solvable}}}}
%  \put(300,100){\makebox(99,20){\large 2}}
%  \put(300,80){\makebox(99,15){\Ss(2,0)}}
%  \put(300,50){\framebox(99,49){\textcolor{red}{\textsl{solvable}}}}
%  \put(300,0){\framebox(99,49){forget |body|}}
%  \put(300,2){\makebox(99,15){\Ss(2,1)}}
%  {\linethickness{1pt}%
%  \multiput(290,65)(5,0){6}{\line(1,0){3}}
%  \put(320,65){\line(-3,-1){12}}
%  \put(320,65){\line(-3,1){12}}}
%  {\linethickness{1pt}%
%  \put(350,65){\line(0,-1){30}}
%  \put(350,65){\line(-1,-3){4}}
%  \put(350,65){\line(1,-3){4}}}
%  \end{picture}}
%  \caption[Specifications and completion rules]{%
%  \begin{minipage}[t]{.7\textwidth}\raggedright\small
%  Specifications \Ss(0,0) to \Ss(2,1) and the completion rules
%  (arrows). The horizonal and vertical denote the number of explicitly
%  specified lengths for margin and body respectively. \Ss(m,b) denote a
%  specification with a set of the numbers (margin,body)=(m,b). 
%  \end{minipage}}
%  \label{fig:specrule}
% \end{figure}
%
% \begin{Spec}
% \item[\Ss(0,0)]
% Nothing is specified. The \Gm\ package sets \gpart{body} with the
% default |scale| ($=$0.7). \\ For example, |width| is set to be
% |0.7\paperwidth|. Thus \Ss(0,0) goes to \Ss(0,1). See \Ss(0,1).
% \bigskip
%
% \item[\Ss(0,1)]
% Only \gpart{body} is specified, such as |width=7in|, |lines=20|,
% |body={20cm,24cm}|, |scale=0.9| and so forth.
% Then \Gm\ sets margins with the margin ratio.
% If the margin ratio is not specified, the default is used.
% The default vertical margin ratio is defined as
% \begin{equation}
%  |top| : |bottom| = 2 : 3 \qquad\textit{default}.
% \end{equation}
% As for the horizontal margin ratio, the default value depends on
% whether the document is onesided or twosided,
% \begin{equation}
%  |left|\;(|inner|) : |right|\;(|outer|) 
%       = \left\{ \begin{array}{ll}
%              1 : 1 \qquad\textit{default for oneside},\\
%              2 : 3 \qquad\textit{default for twoside}.
%         \end{array}\right.
% \end{equation}
% For example, if |height=22cm| is specified on A4 paper, 
% \Gm\ calculates |top| margin as follows:
% \begin{equation}
%   \begin{array}{ll}
%   |top| &= ( |paperheight| - |height| ) \times 2/5 \\
%         &= (29.7-22)\times2/5 = 3.08\textrm{(cm)}
%   \end{array}
% \end{equation}
% Thus |top| margin and body |height| have been determined, the
% specification for the vertical goes to \Ss(1,1) and
% all the parameters can be solved.
% \bigskip
%
% \item[\Ss(1,0)]
% Only one margin is specified, such as |bottom=2cm|, |left=1in|,
% |top=3cm|, and so forth.
%
% \begin{itemize}
% \item \textbf{If the margin ratio is \textit{not} specified}, \Gm\ sets
% \gpart{body} with the default |scale| ($=0.7$). 
% For example, if |top=2.4cm| is specified, \Gm\ sets
% \begin{center}
%     $|height|= |0.7\paperheight|$,
% \end{center}
% then \Ss(1,0) goes to \Ss(1,1), in which |bottom| is calculated
% with $|paperheight|-(|height|+|top|)$ and results in 6.51cm on A4
% paper.
% \medskip
% \item \textbf{If the margin ratio is specified}, such as
% |hmarginratio={1:2}|, |vratio={3:4}| and so forth,
% \Gm\ sets the other% margin with the specified margin ratio.
% For example, if a set of options ``|top=2.4cm, vratio={3:4}|'' is
% specified, \Gm\ sets |bottom| to be |3.2cm| calculating
% \begin{center}
%     $|bottom|= |top|/3\times4 = 3.2\textrm{cm}$
% \end{center}
% Thus \Ss(1,0) goes to \Ss(2,0).
% \end{itemize}
%
% Notes that the version 4 or earlier used to set the other margin
% with the margin ratio. In the version 5, therefore, with the
% same specification, the result will be different from the one in the
% version 4. For example, if only |top=2.4cm| is specified, 
% you got |bottom=2.4cm| in the version 4 or earlier, but you will get
% |bottom=6.51cm| in the version 5.
% \bigskip
%
% \item[\Ss(2,1)]
% The \gpart{body} and two \gpart{margins} are all specified, such as
%  |vdivide={1in,8in,1.5in}|, ``|left=3cm,width=13cm,right=4cm|'' and
%  so forth. Since \Gm\ basically gives priority to \gpart{margins}
%  if dimensions are overspecified, \Gm\ forgets and resets
%  \gpart{body}. For example, if you specify
% \begin{center}
%    |\usepackage[a4paper,left=3cm,width=13cm,right=4cm]{geometry}|,
% \end{center}
% |width| is reset to be 14cm because the width of a A4 paper is 21cm
% long.
% \end{Spec}
%
% \section{Changing layout mid-document}\label{sec:midchange}
%
% The version 5 provides the new commands \cs{newgeometry\{$\cdots$\}}
% and \cs{restoregeometry}, which allow you to change page dimensions
% in the middle of the document. Unlike \cs{geometry} in the preamble,
% \cs{newgeometry} is available only after |\begin{document}|,
% resets all the options ever specified except for the
% papersize-related options: |landscape|,|portrait|, and paper size
% options (such as |papersize|, |paper=a4paper| and so forth), which
% can't be changed with \cs{newgeometry}. 
%
% The command \cs{restoregeometry} restores the page layout specified
% in the preamble (before |\begin{document}|) with the options to
% |\usepackage{geometry}| and \cs{geometry}.
%
% Note that both \cs{newgeometry} and \cs{restoregeometry} insert
% |\clearpage| where they are called.
%
% Below is an example of changing layout mid-document. The layout L1
% specified with |hmargin=3cm| (|left| and |right| margins are |3cm|
% long) is changed to L2 with |left=3cm|,|right=1cm| and
% |bottom=0.1cm|. The layout L1 is restored with
% \cs{restoregeometry}. 
% \begin{center}
% \begin{minipage}{.8\textwidth}
% |\usepackage[hmargin=3cm]{geometry}|\\
% |\begin{document}|\\
%  \medskip
%  \hspace{1cm}\fbox{Layout L1}\\
% \medskip
% |\newgeometry{left=3cm,right=1cm,bottom=0.1cm}|\\
% \medskip
%  \hspace{1cm}\fbox{Layout L2 (new)}\\
% \medskip
% |\restoregeometry|\\
% \medskip
%  \hspace{1cm}\fbox{Layout L1 (restored)}\\
% \medskip
% |\newgeometry{margin=1cm,includefoot}|\\
% \medskip
%  \hspace{1cm}\fbox{Layout L3 (new)}\\
% \medskip
% |\end{document}|
% \end{minipage}%
% \end{center}
% \begin{center}
%  \centering\small
%  {\unitlength=.8pt
%  \begin{picture}(450,180)(0,0)
%  \put(0,165){\makebox(95,12){(saved)}}
%  \put(15,135){\framebox(65,10){\gpart{head}}}
%  \put(15,60){\framebox(65,70){\gpart{body}}}
%  \put(15,45){\makebox(65,12){\gpart{foot}}}
%  \put(15,45){\line(1,0){65}}
%  \put(0,20){\framebox(95,140){}}
%  \put(0,0){\makebox(95,20){L1}}
%  \put(104,90){\circle*{4}}
%  \put(110,90){\circle*{4}}
%  \put(116,90){\circle*{4}}
%  \put(125,165){\makebox(95,12){\cs{newgeometry}}}
%  \put(140,135){\framebox(71,10){\gpart{head}}}
%  \put(140,33){\framebox(71,97){\gpart{body}}}
%  \put(140,21){\makebox(71,12){\gpart{foot}}}
%  \put(125,20){\framebox(95,140){}}
%  \put(125,0){\makebox(95,20){L2 (new)}}
%  \put(229,90){\circle*{4}}
%  \put(235,90){\circle*{4}}
%  \put(241,90){\circle*{4}}
%  \put(250,165){\makebox(95,12){\cs{restoregeometry}}}
%  \put(265,135){\framebox(65,10){\gpart{head}}}
%  \put(265,60){\framebox(65,70){\gpart{body}}}
%  \put(265,45){\makebox(65,12){\gpart{foot}}}
%  \put(265,45){\line(1,0){65}}
%  \put(250,20){\framebox(95,140){}}
%  \put(250,0){\makebox(95,20){L1 (restored)}}
%  \put(354,90){\circle*{4}}
%  \put(360,90){\circle*{4}}
%  \put(366,90){\circle*{4}}
%  \put(375,165){\makebox(95,12){\cs{newgeometry}}}
%  \put(383,33){\framebox(80,120){\gpart{body}}}
%  \put(383,21){\makebox(80,12){\gpart{foot}}}
%  \put(375,20){\framebox(95,140){}}
%  \put(375,0){\makebox(95,20){L3 (new)}}
%  \end{picture}}
% \end{center}
%
% A set of commands |\savegeometry{|\meta{name}|}| and
% |\loadgeometry{|\meta{name}|}| is handy if you want to
% reuse more different layouts in your document.
% For example, 
% \begin{center}
% \begin{verbatim}
%     \usepackage[hmargin=3cm]{geometry}
%     \begin{document}
%           L1
%     \newgeometry{left=3cm,right=1cm,bottom=0.1cm}
%     \savegeometry{L2}
%           L2 (new, saved)
%     \restoregeometry
%           L1 (restored)
%     \newgeometry{margin=1cm,includefoot}
%           L3 (new)
%     \loadgeometry{L2}
%           L2 (loaded)
%     \end{document}
% \end{verbatim}
% \end{center}
%
% \section{Examples}
%
% \begin{itemize}
% \item A onesided page layout with the text area centered in the paper.
% The examples below have the same result because the horizontal margin ratio
% is set |1:1| for oneside by default.
% \begin{itemize}
%   \item |centering|
%   \item |marginratio=1:1|
%   \item |vcentering|
% \end{itemize}
%
% \item A twosided page layout with the inside offset for binding |1cm|.
% \begin{itemize}
%   \item |twoside, bindingoffset=1cm|
% \end{itemize}
% In this case, |textwidth| is shorter than that of the default twosided
% document by $0.7\times|1cm|$ ($=$|0.7cm|) because the default width of
% \gpart{body} is set with |scale=0.7| (which means
% $|width|=0.7|\paperwidth|$).
%
% \item A layout with the left, right, and top margin |3cm|, |2cm| and
% |2.5in| respectively, with textheight of 40 lines, and with the head and
% foot of the page included in \gpart{total body}.
% The two examples below have the same result.
% \begin{itemize}
%   \item |left=3cm, right=2cm, lines=40, top=2.5in, includeheadfoot|
%   \item |hmargin={3cm,2cm}, tmargin=2.5in, lines=40, includeheadfoot|
% \end{itemize}
%
% \item A layout with the height of \gpart{total body} |10in|, the bottom
%  margin |2cm|, and the default width. The top margin will be calculated
%  automatically. Each solution below results in the same page layout.
% \begin{itemize}
%     \item |vdivide={*, 10in, 2cm}|
%     \item |bmargin=2cm, height=10in|
%     \item |bottom=2cm, textheight=10in| 
% \end{itemize}
% Note that dimensions for \gpart{head} and \gpart{foot} are excluded from
% |height| of \gpart{total body}. An additional |includefoot| makes
% \cs{footskip} included in |totalheight|. Therefore, in the two cases below,
% |textheight| in the former layout is shorter than the latter
% (with 10in exactly) by \cs{footskip}. In other words, 
% |height| = |textheight| + |footskip| when |includefoot=true| in this case.
% \begin{itemize}
%     \item |bmargin=2cm, height=10in, includefoot|
%     \item |bottom=2cm, textheight=10in, includefoot|
% \end{itemize}
%
% \item A layout with \glen{textwidth} and \glen{textheight} 90\% of the
% paper and with \gpart{body} centered.
% Each solution below results in the same page layout.
% \begin{itemize}
%   \item |scale=0.9, centering|
%   \item |text={.9\paperwidth,.9\paperheight}, ratio=1:1|
%   \item |width=.9\paperwidth, vmargin=.05\paperheight, marginratio=1:1|
%   \item |hdivide={*,0.9\paperwidth,*}, vdivide={*,0.9\paperheight,*}|
%   (as for onesided documents)
%   \item |margin={0.05\paperwidth,0.05\paperheight}|
% \end{itemize}
% You can add |heightrounded| to avoid an ``underfull vbox warning'' like
% \begin{quote}\small
%  |Underfull \vbox (badness 10000) has occurred while \output is active|.
% \end{quote}
% See Section~\ref{sec:body} for the detail description about |heightrounded|.
%
% \item A layout with the width of marginal notes |3cm| and included in the
% width of \gpart{total body}. The following examples are the same.
% \begin{itemize}
%   \item |marginparwidth=3cm, includemp|
%   \item |marginpar=3cm, ignoremp=false|
% \end{itemize}
%
% \item A layout the full scale \gpart{body} of the paper with A5 paper in
% landscape. The following examples are the same.
% \begin{itemize}
%   \item |a5paper, landscape, scale=1.0|
%   \item |landscape=TRUE, paper=a5paper, margin=0pt|
% \end{itemize}
%
% \item  A screen size layout appropriate to presentation with PC and video
%        projector.
% \begin{verbatim}
%   \documentclass{slide}
%   \usepackage[screen,margin=0.8in]{geometry}
%    ...
%   \begin{slide}
%      ...
%   \end{slide}\end{verbatim}
% \item A layout with fonts and spaces both enlarged from A4 to A3.
%  In the case below, the resulted paper size is A3.
% \begin{itemize}
%     \item |a4paper, mag=1414|.
% \end{itemize}
% If you want to have a layout with two times bigger fonts, but without
% changing paper size, you can go 
% \begin{itemize}
%   \item |letterpaper, mag=2000, truedimen|.
% \end{itemize}
%  You can add |dvips| option, that is useful to preview it with proper
%  paper size by |dviout| or |xdvi|.
%
% \item A complex page layout.
% \begin{verbatim}
%  \usepackage[a5paper, landscape, twocolumn, twoside,
%      left=2cm, hmarginratio=2:1, includemp, marginparwidth=43pt, 
%      bottom=1cm, foot=.7cm, includefoot, textheight=11cm, heightrounded,
%      columnsep=1cm, dvips,  verbose]{geometry}\end{verbatim}
% Try typesetting it and checking out the result yourself. |:-)|
% \end{itemize}
%
% \section{Known problems}
% \begin{itemize}
%  \item With |pdftex=true|, |mag| $\neq 1000$ and |truedimen|,
%  |paperwidth| and |paperheight| shown in verbose mode are different
%  from the real size of the resulted PDF. The PDF itself is correct anyway.
%
%  \item With |pdftex=true|, |mag| $\neq 1000$, \textit{no} |truedimen|,
%  and \textsf{hyperref}, \textsf{hyperref} should be loaded
%  by \cs{usepackage} before \Gm. 
%  Otherwise the resulted PDF size will become wrong.
%
%  \item With \textsf{crop} package and |mag| $\neq 1000$,
%  |center| option of \textsf{crop} doesn't work well.
%
% \end{itemize}
%
% \section{Acknowledgments}
%  The author appreciates helpful suggestions and comments from many
%  people including (in alphabetical order of family name):
%  Jean-Bernard Addor, 
%  Frank Bennett,
%  Alexis Dimitriadis,
%  Friedrich Flender,
%  Adrian Heathcote,
%  Stephan Hennig,
%  Morten H\o{}gholm,
%  Jonathan Kew,
%  James Kilfiger,
%  Jean-Marc Lasgouttes,
%  Wlodzimierz Macewicz,
%  Frank Mittelbach,
%  Eckhard Neber,
%  Rolf Niepraschk,
%  Hans Fr.~Nordhaug,
%  Heiko Oberdiek,
%  Keith Reckdahl, 
%  Peter Riocreux,
%  Will Robertson,
%  Pablo Rodriguez,
%  Nico Schl\"{o}emer,
%  Perry C.~Stearns, 
%  Frank Stengel,
%  Plamen Tanovski,
%  Petr Uher,
%  Piet van Oostrum,
%  Vladimir Volovich,
%  Michael Vulis.
%
% \StopEventually{%
% }
% 
% \newgeometry{hmargin={4.2cm,1.5cm},vmargin={1cm,1cm},
%              includeheadfoot, marginpar=3.8cm}
% \section{Implementation}
%    \begin{macrocode}
%<*package>
%    \end{macrocode}
%    This package requires three other packages: \textsf{keyval} in
%    \LaTeX\ graphics bundle, \textsf{ifpdf} and \textsf{ifvtex} in
%    `oberdiek' bundle.
%    \begin{macrocode}
\RequirePackage{keyval}%
\RequirePackage{ifpdf}%
\RequirePackage{ifvtex}%
%    \end{macrocode}
% 
%    Internal switches are declared here.
%    \begin{macrocode}
\newif\ifGm@verbose
\newif\ifGm@landscape
\newif\ifGm@swap@papersize\Gm@swap@papersizefalse
\newif\ifGm@includehead
\newif\ifGm@includefoot
\newif\ifGm@includemp
\newif\ifGm@hbody
\newif\ifGm@vbody
\newif\ifGm@heightrounded
\newif\ifGm@showframe
\newif\ifGm@showcrop
\newif\ifGm@pass\Gm@passfalse
\newif\ifGm@resetpaper
\newif\ifGm@layout
\newif\ifGm@newgm
%    \end{macrocode}
%    \begin{macro}{\Gm@cnth}
%    \begin{macro}{\Gm@cntv}
%    Counters for horizontal and vertical partitioning patterns.
%    \begin{macrocode}
\newcount\Gm@cnth
\newcount\Gm@cntv
%    \end{macrocode}
%    \end{macro}\end{macro}
%    \begin{macro}{\c@Gm@tempcnt}
%    The counter is used to set number with \textsf{calc}.
%    \begin{macrocode}
\newcount\c@Gm@tempcnt
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@bindingoffset}
%    An additional inner offset for binding.
%    \begin{macrocode}
\newdimen\Gm@bindingoffset
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@wd@mp}
%    \begin{macro}{\Gm@odd@mp}
%    \begin{macro}{\Gm@even@mp}
%    Correction lengths for \cs{textwidth}, \cs{oddsidemargin} and 
%    \cs{evensidemargin} in |includemp| mode.
%    \begin{macrocode}
\newdimen\Gm@wd@mp
\newdimen\Gm@odd@mp
\newdimen\Gm@even@mp
%    \end{macrocode}
%    \end{macro}\end{macro}\end{macro}
%    \begin{macro}{\Gm@layoutwidth}
%    \begin{macro}{\Gm@layoutheight}
%    \begin{macro}{\Gm@layouthoffset}
%    \begin{macro}{\Gm@layoutvoffset}
%    The dimensions for the layout.
%    \begin{macrocode}
\newdimen\Gm@layoutwidth
\newdimen\Gm@layoutheight
\newdimen\Gm@layouthoffset
\newdimen\Gm@layoutvoffset
%    \end{macrocode}
%    \end{macro}\end{macro}\end{macro}\end{macro}
%    \begin{macro}{\Gm@dimlist}
%    The token in which \LaTeX{} Native dimensions are stored.
%    \begin{macrocode}
\newtoks\Gm@dimlist
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@warning}
%    Macro for printing warning messages.
%    \begin{macrocode}
\def\Gm@warning#1{\PackageWarningNoLine{geometry}{#1}}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\ifGm@preamble}
%     process the options only if it's specified in the preamble.
%    \begin{macrocode}
\def\ifGm@preamble#1{%
  \ifGm@newgm
   \Gm@warning{`#1': not available in `\string\newgeometry'; skipped}%
  \else
    \expandafter\@firstofone
  \fi}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@Dhratio}
%    \begin{macro}{\Gm@Dhratiotwo}
%    \begin{macro}{\Gm@Dvratio}
%    The default values for the horizontal and vertical \textsl{marginalratio}
%    are defined. \cs{Gm@Dhratiotwo} denotes the default value of
%    horizonal \textsl{marginratio} for twoside page layout with
%    left and right margins swapped on verso pages, which is 
%    set by |twoside|.
%    \begin{macrocode}
\def\Gm@Dhratio{1:1}% = left:right default for oneside
\def\Gm@Dhratiotwo{2:3}% = inner:outer default for twoside.
\def\Gm@Dvratio{2:3}% = top:bottom default
%    \end{macrocode}
%    \end{macro}\end{macro}\end{macro}
%
%    \begin{macro}{\Gm@Dhscale}
%    \begin{macro}{\Gm@Dvscale}
%    The default values for the horizontal and vertical \textsl{scale}
%    are defined. 
%    \begin{macrocode}
\def\Gm@Dhscale{0.7}%
\def\Gm@Dvscale{0.7}%
%    \end{macrocode}
%    \end{macro}\end{macro}
%
%    \begin{macro}{\Gm@dvips}%
%    \begin{macro}{\Gm@dvipdfm}%
%    \begin{macro}{\Gm@pdftex}%
%    \begin{macro}{\Gm@xetex}%
%    \begin{macro}{\Gm@vtex}%
%    The driver names.
%    \begin{macrocode}
\def\Gm@dvips{dvips}%
\def\Gm@dvipdfm{dvipdfm}%
\def\Gm@pdftex{pdftex}%
\def\Gm@xetex{xetex}%
\def\Gm@vtex{vtex}%
%    \end{macrocode}
%    \end{macro}\end{macro}\end{macro}\end{macro}\end{macro}
%
%    \begin{macro}{\Gm@true}%
%    \begin{macro}{\Gm@false}%
%    \begin{macrocode}
\def\Gm@true{true}%
\def\Gm@false{false}%
%    \end{macrocode}
%    \end{macro}\end{macro}
%
%    \begin{macro}{\Gm@orgpw}
%    \begin{macro}{\Gm@orgph}
%    These macros keep original paper (media) size intact.
%    \begin{macrocode}
\edef\Gm@orgpw{\the\paperwidth}%
\edef\Gm@orgph{\the\paperheight}%
%    \end{macrocode}
%    \end{macro}\end{macro}
%
%    \begin{macro}{\Gm@savelength}
%    \begin{macrocode}
\def\Gm@savelength#1{%
  \edef\@@tmp{\expandafter\the\csname #1\endcsname}%
  \g@addto@macro\Gm@restore{\expandafter\noexpand\expandafter\csname
  #1\endcsname\expandafter=\expandafter\the\csname #1\endcsname\relax}}
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@saveboolean}
%    \begin{macrocode}
\def\Gm@saveboolean#1{%
  \csname if#1\endcsname
    \g@addto@macro\Gm@restore{\expandafter\noexpand\csname #1true\endcsname}%
  \else
    \g@addto@macro\Gm@restore{\expandafter\noexpand\csname #1false\endcsname}%
  \fi}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@restore}
%    \begin{macrocode}
\def\Gm@restore{}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@save}
%    \begin{macrocode}
\def\Gm@save{%
  \Gm@savelength{paperwidth}%
  \Gm@savelength{paperheight}%
  \Gm@savelength{textwidth}%
  \Gm@savelength{textheight}%
  \Gm@savelength{evensidemargin}%
  \Gm@savelength{oddsidemargin}%
  \Gm@savelength{topmargin}%
  \Gm@savelength{headheight}%
  \Gm@savelength{headsep}%
  \Gm@savelength{topskip}%
  \Gm@savelength{footskip}%
  \Gm@savelength{baselineskip}%
  \Gm@savelength{marginparwidth}%
  \Gm@savelength{marginparsep}%
  \Gm@savelength{columnsep}%
  \Gm@savelength{hoffset}%
  \Gm@savelength{voffset}
  \Gm@savelength{Gm@layouthoffset}%
  \Gm@savelength{Gm@layoutvoffset}%
  \Gm@saveboolean{@twocolumn}%
  \Gm@saveboolean{@twoside}%
  \Gm@saveboolean{@mparswitch}%
  \Gm@saveboolean{@reversemargin}}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@initnewgm}
%    \begin{macrocode}
\def\Gm@initnewgm{%
  \Gm@dimlist={}
  \Gm@hbodyfalse
  \Gm@vbodyfalse
  \Gm@heightroundedfalse
  \Gm@includeheadfalse
  \Gm@includefootfalse
  \Gm@includempfalse
  \let\Gm@width\@undefined
  \let\Gm@height\@undefined
  \let\Gm@textwidth\@undefined
  \let\Gm@textheight\@undefined
  \let\Gm@hscale\@undefined
  \let\Gm@vscale\@undefined
  \let\Gm@hmarginratio\@undefined
  \let\Gm@vmarginratio\@undefined
  \let\Gm@lmargin\@undefined
  \let\Gm@rmargin\@undefined
  \let\Gm@tmargin\@undefined
  \let\Gm@bmargin\@undefined
  \Gm@layoutfalse
  \Gm@layouthoffset\z@
  \Gm@layoutvoffset\z@
  \Gm@bindingoffset\z@}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@initall}
%    \begin{macrocode}
\def\Gm@initall{%
  \let\Gm@driver\@empty
  \let\Gm@truedimen\@empty
  \let\Gm@paper\@undefined
  \Gm@resetpaperfalse
  \Gm@landscapefalse
  \Gm@verbosefalse
  \Gm@showframefalse
  \Gm@showcropfalse
  \Gm@newgmfalse
  \Gm@initnewgm}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@setdriver}
%    The macro sets the specified driver.
%    \begin{macrocode}
\def\Gm@setdriver#1{%
  \expandafter\let\expandafter\Gm@driver\csname Gm@#1\endcsname}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@unsetdriver}
%    The macro unsets the specified driver if it has been set.
%    \begin{macrocode}
\def\Gm@unsetdriver#1{%
  \expandafter\ifx\csname Gm@#1\endcsname\Gm@driver\let\Gm@driver\@empty\fi}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@setbool}
%    \begin{macro}{\Gm@setboolrev}
%    The macros set a boolean option.
%    \begin{macrocode}
\def\Gm@setbool{\@dblarg\Gm@@setbool}%
\def\Gm@setboolrev{\@dblarg\Gm@@setboolrev}%
\def\Gm@@setbool[#1]#2#3{\Gm@doif{#1}{#3}{\csname Gm@#2\Gm@bool\endcsname}}%
\def\Gm@@setboolrev[#1]#2#3{\Gm@doifelse{#1}{#3}%
  {\csname Gm@#2\Gm@false\endcsname}{\csname Gm@#2\Gm@true\endcsname}}%
%    \end{macrocode}
%    \end{macro}\end{macro}
%    \begin{macro}{\Gm@doif}
%    \begin{macro}{\Gm@doifelse}
%    \cs{Gm@doif} excutes the third argument |#3| using a boolean value
%    |#2| of a option |#1|. \cs{Gm@doifelse} executes the third
%    argument |#3| if a boolean option |#1| with its value |#2| is |true|,
%    and executes the fourth argument |#4| if |false|.
%    \begin{macrocode}
\def\Gm@doif#1#2#3{%
  \lowercase{\def\Gm@bool{#2}}%
  \ifx\Gm@bool\@empty
    \let\Gm@bool\Gm@true
  \fi
  \ifx\Gm@bool\Gm@true
  \else
    \ifx\Gm@bool\Gm@false
    \else
      \let\Gm@bool\relax
    \fi
  \fi
  \ifx\Gm@bool\relax
    \Gm@warning{`#1' should be set to `true' or `false'}%
  \else
    #3
  \fi}%
\def\Gm@doifelse#1#2#3#4{%
  \Gm@doif{#1}{#2}{\ifx\Gm@bool\Gm@true #3\else #4\fi}}%
%    \end{macrocode}
%    \end{macro}\end{macro}
%
%    \begin{macro}{\Gm@reverse}
%    The macro reverses a bool value.
%    \begin{macrocode}
\def\Gm@reverse#1{%
  \csname ifGm@#1\endcsname
  \csname Gm@#1false\endcsname\else\csname Gm@#1true\endcsname\fi}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@defbylen}
%    \begin{macro}{\Gm@defbycnt}
%    Macros \cs{Gm@defbylen} and \cs{Gm@defbycnt} can be used to define
%    \cs{Gm@xxxx} variables by length and counter respectively
%    with \textsf{calc} package.
%    \begin{macrocode}
\def\Gm@defbylen#1#2{%
  \setlength\@tempdima{#2}%
  \expandafter\edef\csname Gm@#1\endcsname{\the\@tempdima}}%
\def\Gm@defbycnt#1#2{%
  \setcounter{Gm@tempcnt}{#2}%
  \expandafter\edef\csname Gm@#1\endcsname{\the\value{Gm@tempcnt}}}%
%    \end{macrocode}
%    \end{macro}\end{macro}
%    \begin{macro}{\Gm@set@ratio}
%    The macro parses the value of options specifying marginal ratios,
%    which is used in \cs{Gm@setbyratio} macro.
%    \begin{macrocode}
\def\Gm@sep@ratio#1:#2{\@tempcnta=#1\@tempcntb=#2}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@setbyratio}
%    The macro determines the dimension specified by |#4| calculating
%    |#3|$\times a / b$, where $a$ and $b$ are given by \cs{Gm@mratio}
%    with $a:b$ value. If |#1| in brackets is |b|, $a$ and $b$ are swapped.
%    The second argument with |h| or |v| denoting horizontal or vertical
%    is not used in this macro.
%    \begin{macrocode}
\def\Gm@setbyratio[#1]#2#3#4{% determine #4 by ratio
  \expandafter\Gm@sep@ratio\Gm@mratio\relax
  \if#1b
    \edef\@@tempa{\the\@tempcnta}%
    \@tempcnta=\@tempcntb
    \@tempcntb=\@@tempa\relax
  \fi
  \expandafter\setlength\expandafter\@tempdimb\expandafter
    {\csname Gm@#3\endcsname}%
  \ifnum\@tempcntb>\z@
    \multiply\@tempdimb\@tempcnta
    \divide\@tempdimb\@tempcntb
  \fi
  \expandafter\edef\csname Gm@#4\endcsname{\the\@tempdimb}}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@detiv}
%    This macro determines the fourth length(|#4|) from |#1|(\glen{layoutwidth}
%    or \glen{layoutheight}), |#2| and |#3|. It is used in
%    \cs{Gm@detall} macro.
%    \begin{macrocode}
\def\Gm@detiv#1#2#3#4{% determine #4.
  \expandafter\setlength\expandafter\@tempdima\expandafter
    {\csname Gm@layout#1\endcsname}%
  \expandafter\setlength\expandafter\@tempdimb\expandafter
    {\csname Gm@#2\endcsname}%
  \addtolength\@tempdima{-\@tempdimb}%
  \expandafter\setlength\expandafter\@tempdimb\expandafter
    {\csname Gm@#3\endcsname}%
  \addtolength\@tempdima{-\@tempdimb}%
  \ifdim\@tempdima<\z@
    \Gm@warning{`#4' results in NEGATIVE (\the\@tempdima).%
    ^^J\@spaces `#2' or `#3' should be shortened in length}%
  \fi
  \expandafter\edef\csname Gm@#4\endcsname{\the\@tempdima}}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@detiiandiii}
%    This macro determines |#2| and |#3| from |#1| with the first argument
%    (|#1|) can be |width| or |height|, which is expanded into dimensions
%    of paper and total body. It is used in \cs{Gm@detall} macro.
%    \begin{macrocode}
\def\Gm@detiiandiii#1#2#3{% determine #2 and #3.
  \expandafter\setlength\expandafter\@tempdima\expandafter
    {\csname Gm@layout#1\endcsname}%
  \expandafter\setlength\expandafter\@tempdimb\expandafter
    {\csname Gm@#1\endcsname}%
  \addtolength\@tempdima{-\@tempdimb}%
  \ifdim\@tempdima<\z@
    \Gm@warning{`#2' and `#3' result in NEGATIVE (\the\@tempdima).%
                  ^^J\@spaces `#1' should be shortened in length}%
  \fi
  \ifx\Gm@mratio\@undefined
    \expandafter\Gm@sep@ratio\Gm@Dmratio\relax
  \else
    \expandafter\Gm@sep@ratio\Gm@mratio\relax
    \ifnum\@tempcntb>\z@\else
      \Gm@warning{margin ratio a:b should be non-zero; default used}%
      \expandafter\Gm@sep@ratio\Gm@Dmratio\relax
    \fi
  \fi 
  \@tempdimb=\@tempdima
  \advance\@tempcntb\@tempcnta
  \divide\@tempdima\@tempcntb
  \multiply\@tempdima\@tempcnta
  \advance\@tempdimb-\@tempdima
  \expandafter\edef\csname Gm@#2\endcsname{\the\@tempdima}%
  \expandafter\edef\csname Gm@#3\endcsname{\the\@tempdimb}}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@detall} 
%    This macro determines partition of each direction.
%    The first argument (|#1|) should be |h| or |v|, the second (|#2|)
%    |width| or |height|, the third (|#3|) |lmargin| or |top|, and 
%    the last (|#4|) |rmargin| or |bottom|.
%    \begin{macrocode}
\def\Gm@detall#1#2#3#4{%
  \@tempcnta\z@
  \if#1h
    \let\Gm@mratio\Gm@hmarginratio
    \edef\Gm@Dmratio{\if@twoside\Gm@Dhratiotwo\else\Gm@Dhratio\fi}%
  \else
    \let\Gm@mratio\Gm@vmarginratio
    \edef\Gm@Dmratio{\Gm@Dvratio}%
  \fi
%    \end{macrocode}
%    \cs{@tempcnta} is treated as a three-digit binary value with
%    top, middle and bottom denoted |left|(|top|), |width|(|height|)
%    and |right|(|bottom|) margins user specified respectively.
%    \begin{macrocode}
  \if#1h
    \ifx\Gm@lmargin\@undefined\else\advance\@tempcnta4\relax\fi
    \ifGm@hbody\advance\@tempcnta2\relax\fi
    \ifx\Gm@rmargin\@undefined\else\advance\@tempcnta1\relax\fi
    \Gm@cnth\@tempcnta
  \else
    \ifx\Gm@tmargin\@undefined\else\advance\@tempcnta4\relax\fi
    \ifGm@vbody\advance\@tempcnta2\relax\fi
    \ifx\Gm@bmargin\@undefined\else\advance\@tempcnta1\relax\fi
    \Gm@cntv\@tempcnta
  \fi
%    \end{macrocode}
%    Case the value is |000| (=0) with nothing fixed (default):
%    \begin{macrocode}
  \ifcase\@tempcnta
    \if#1h
      \edef\Gm@width{\Gm@Dhscale\Gm@layoutwidth}%
    \else
      \edef\Gm@height{\Gm@Dvscale\Gm@layoutheight}%
    \fi
    \Gm@detiiandiii{#2}{#3}{#4}%
%    \end{macrocode}
%    Case |001| (=1) with |right|(|bottom|) fixed:
%    \begin{macrocode}
  \or
    \ifx\Gm@mratio\@undefined
      \if#1h
        \edef\Gm@width{\Gm@Dhscale\Gm@layoutwidth}%
      \else
        \edef\Gm@height{\Gm@Dvscale\Gm@layoutheight}%
      \fi
      \setlength\@tempdimc{\@nameuse{Gm@#4}}%
      \Gm@detiiandiii{#2}{#3}{#4}%
      \expandafter\let\csname Gm@#2\endcsname\@undefined
      \expandafter\edef\csname Gm@#4\endcsname{\the\@tempdimc}%
    \else
      \Gm@setbyratio[f]{#1}{#4}{#3}%
    \fi
    \Gm@detiv{#2}{#3}{#4}{#2}%
%    \end{macrocode}
%    Case |010| (=2) with |width|(|height|) fixed:
%    \begin{macrocode}
  \or\Gm@detiiandiii{#2}{#3}{#4}%
%    \end{macrocode}
%    Case |011| (=3) with both |width|(|height|) and |right|(|bottom|) fixed:
%    \begin{macrocode}
  \or\Gm@detiv{#2}{#2}{#4}{#3}%
%    \end{macrocode}
%    Case |100| (=4) with |left|(|top|) fixed:
%    \begin{macrocode}
  \or
    \ifx\Gm@mratio\@undefined
      \if#1h
        \edef\Gm@width{\Gm@Dhscale\Gm@layoutwidth}%
      \else
        \edef\Gm@height{\Gm@Dvscale\Gm@layoutheight}%
      \fi
      \setlength\@tempdimc{\@nameuse{Gm@#3}}%
      \Gm@detiiandiii{#2}{#4}{#3}%
      \expandafter\let\csname Gm@#2\endcsname\@undefined
      \expandafter\edef\csname Gm@#3\endcsname{\the\@tempdimc}%
    \else
      \Gm@setbyratio[b]{#1}{#3}{#4}%
    \fi
    \Gm@detiv{#2}{#3}{#4}{#2}%
%    \end{macrocode}
%    Case |101| (=5) with both |left|(|top|) and |right|(|bottom|) fixed:
%    \begin{macrocode}
  \or\Gm@detiv{#2}{#3}{#4}{#2}%
%    \end{macrocode}
%    Case |110| (=6) with both |left|(|top|) and |width|(|height|) fixed:
%    \begin{macrocode}
  \or\Gm@detiv{#2}{#2}{#3}{#4}%
%    \end{macrocode}
%    Case |111| (=7) with all fixed though it is over-specified:
%    \begin{macrocode}
  \or\Gm@warning{Over-specification in `#1'-direction.%
                  ^^J\@spaces `#2' (\@nameuse{Gm@#2}) is ignored}%
    \Gm@detiv{#2}{#3}{#4}{#2}%
  \else\fi}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@clean}
%    The macro for setting unspecified dimensions to be \cs{@undefined}.
%    This is used by \cs{geometry} macro.
%    \begin{macrocode}
\def\Gm@clean{%
  \ifnum\Gm@cnth<4\let\Gm@lmargin\@undefined\fi
  \ifodd\Gm@cnth\else\let\Gm@rmargin\@undefined\fi
  \ifnum\Gm@cntv<4\let\Gm@tmargin\@undefined\fi
  \ifodd\Gm@cntv\else\let\Gm@bmargin\@undefined\fi
  \ifGm@hbody\else
    \let\Gm@hscale\@undefined
    \let\Gm@width\@undefined
    \let\Gm@textwidth\@undefined
  \fi
  \ifGm@vbody\else
    \let\Gm@vscale\@undefined
    \let\Gm@height\@undefined
    \let\Gm@textheight\@undefined
  \fi
  }%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@parse@divide}
%    The macro parses (|h|,|v|)|divide| options.
%    \begin{macrocode}
\def\Gm@parse@divide#1#2#3#4{%
  \def\Gm@star{*}%
  \@tempcnta\z@
  \@for\Gm@tmp:=#1\do{%
    \expandafter\KV@@sp@def\expandafter\Gm@frag\expandafter{\Gm@tmp}%
    \edef\Gm@value{\Gm@frag}%
    \ifcase\@tempcnta\relax\edef\Gm@key{#2}%
      \or\edef\Gm@key{#3}%
      \else\edef\Gm@key{#4}%
    \fi
    \@nameuse{Gm@set\Gm@key false}%
    \ifx\empty\Gm@value\else
    \ifx\Gm@star\Gm@value\else
      \setkeys{Gm}{\Gm@key=\Gm@value}%
    \fi\fi
    \advance\@tempcnta\@ne}%
  \let\Gm@star\relax}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@branch}
%    The macro splits a value into the same two values.
%    \begin{macrocode}
\def\Gm@branch#1#2#3{%
  \@tempcnta\z@
  \@for\Gm@tmp:=#1\do{%
    \KV@@sp@def\Gm@frag{\Gm@tmp}%
    \edef\Gm@value{\Gm@frag}%
    \ifcase\@tempcnta\relax% cnta == 0
      \setkeys{Gm}{#2=\Gm@value}%
    \or% cnta == 1
      \setkeys{Gm}{#3=\Gm@value}%
    \else\fi
    \advance\@tempcnta\@ne}%
  \ifnum\@tempcnta=\@ne
    \setkeys{Gm}{#3=\Gm@value}%
  \fi}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@magtooffset}
%    This macro is used to adjust offsets by \cs{mag}.
%    \begin{macrocode}
\def\Gm@magtooffset{%
  \@tempdima=\mag\Gm@truedimen sp%
  \@tempdimb=1\Gm@truedimen in%
  \divide\@tempdimb\@tempdima
  \multiply\@tempdimb\@m
  \addtolength{\hoffset}{1\Gm@truedimen in}%
  \addtolength{\voffset}{1\Gm@truedimen in}%
  \addtolength{\hoffset}{-\the\@tempdimb}%
  \addtolength{\voffset}{-\the\@tempdimb}}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@setlength}
%    This macro stores \LaTeX{} native dimensions, which are stored and 
%    set afterwards.
%    \begin{macrocode}
\def\Gm@setlength#1#2{%
  \let\Gm@len=\relax\let\Gm@td=\relax
  \edef\addtolist{\noexpand\Gm@dimlist=%
  {\the\Gm@dimlist \Gm@len{#1}{#2}}}\addtolist}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@expandlengths}
%    This macro processes \cs{Gm@dimlist}.
%    \begin{macrocode}
\def\Gm@expandlengths{%
  \def\Gm@td{\Gm@truedimen}%
  \def\Gm@len##1##2{\setlength{##1}{##2}}%
  \the\Gm@dimlist}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@setsize}
%    The macro sets |paperwidth| and |paperheight| dimensions
%    using \cs{Gm@setlength} macro.
%    \begin{macrocode}
\def\Gm@setsize#1(#2,#3)#4{%
  \let\Gm@td\relax
  \expandafter\Gm@setlength\csname #1width\endcsname{#2\Gm@td #4}%
  \expandafter\Gm@setlength\csname #1height\endcsname{#3\Gm@td #4}%
  \ifGm@landscape\Gm@swap@papersizetrue\else\Gm@swap@papersizefalse\fi}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@setpaper@ifpre}
%    The macro changes the paper size.
%    \begin{macrocode}
\def\Gm@setpaper@ifpre#1{%
  \ifGm@preamble{#1}{\def\Gm@paper{#1}\@nameuse{Gm@#1}{paper}}}%
%    \end{macrocode}
%    \end{macro}
%    Various paper size are defined here.
%    \begin{macrocode}
\@namedef{Gm@a0paper}#1{\Gm@setsize{#1}(841,1189){mm}}% ISO A0
\@namedef{Gm@a1paper}#1{\Gm@setsize{#1}(594,841){mm}}% ISO A1
\@namedef{Gm@a2paper}#1{\Gm@setsize{#1}(420,594){mm}}% ISO A2
\@namedef{Gm@a3paper}#1{\Gm@setsize{#1}(297,420){mm}}% ISO A3
\@namedef{Gm@a4paper}#1{\Gm@setsize{#1}(210,297){mm}}% ISO A4
\@namedef{Gm@a5paper}#1{\Gm@setsize{#1}(148,210){mm}}% ISO A5
\@namedef{Gm@a6paper}#1{\Gm@setsize{#1}(105,148){mm}}% ISO A6
\@namedef{Gm@b0paper}#1{\Gm@setsize{#1}(1000,1414){mm}}% ISO B0
\@namedef{Gm@b1paper}#1{\Gm@setsize{#1}(707,1000){mm}}% ISO B1
\@namedef{Gm@b2paper}#1{\Gm@setsize{#1}(500,707){mm}}% ISO B2
\@namedef{Gm@b3paper}#1{\Gm@setsize{#1}(353,500){mm}}% ISO B3
\@namedef{Gm@b4paper}#1{\Gm@setsize{#1}(250,353){mm}}% ISO B4
\@namedef{Gm@b5paper}#1{\Gm@setsize{#1}(176,250){mm}}% ISO B5
\@namedef{Gm@b6paper}#1{\Gm@setsize{#1}(125,176){mm}}% ISO B6
\@namedef{Gm@b0j}#1{\Gm@setsize{#1}(1030,1456){mm}}% JIS B0
\@namedef{Gm@b1j}#1{\Gm@setsize{#1}(728,1030){mm}}% JIS B1
\@namedef{Gm@b2j}#1{\Gm@setsize{#1}(515,728){mm}}% JIS B2
\@namedef{Gm@b3j}#1{\Gm@setsize{#1}(364,515){mm}}% JIS B3
\@namedef{Gm@b4j}#1{\Gm@setsize{#1}(257,364){mm}}% JIS B4
\@namedef{Gm@b5j}#1{\Gm@setsize{#1}(182,257){mm}}% JIS B5
\@namedef{Gm@b6j}#1{\Gm@setsize{#1}(128,182){mm}}% JIS B6
\@namedef{Gm@ansiapaper}#1{\Gm@setsize{#1}(8.5,11){in}}%
\@namedef{Gm@ansibpaper}#1{\Gm@setsize{#1}(11,17){in}}%
\@namedef{Gm@ansicpaper}#1{\Gm@setsize{#1}(17,22){in}}%
\@namedef{Gm@ansidpaper}#1{\Gm@setsize{#1}(22,34){in}}%
\@namedef{Gm@ansiepaper}#1{\Gm@setsize{#1}(34,44){in}}%
\@namedef{Gm@letterpaper}#1{\Gm@setsize{#1}(8.5,11){in}}%
\@namedef{Gm@legalpaper}#1{\Gm@setsize{#1}(8.5,14){in}}%
\@namedef{Gm@executivepaper}#1{\Gm@setsize{#1}(7.25,10.5){in}}%
\@namedef{Gm@screen}#1{\Gm@setsize{#1}(225,180){mm}}%
%    \end{macrocode}
%
%  \begin{key}{Gm}{paper}
%    |paper| takes a paper name as its value.
%    \begin{macrocode}
\define@key{Gm}{paper}{\setkeys{Gm}{#1}}%
\let\KV@Gm@papername\KV@Gm@paper
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{a[0-6]paper}
%  \begin{key}{Gm}{b[0-6]paper}
%  \begin{key}{Gm}{b[0-6]j}
%  \begin{key}{Gm}{ansi[a-e]paper}
%  \begin{key}{Gm}{letterpaper}
%  \begin{key}{Gm}{legalpaper}
%  \begin{key}{Gm}{executivepaper}
%  \begin{key}{Gm}{screen}
%    The following paper names are available.
%    \begin{macrocode}
\define@key{Gm}{a0paper}[true]{\Gm@setpaper@ifpre{a0paper}}%
\define@key{Gm}{a1paper}[true]{\Gm@setpaper@ifpre{a1paper}}%
\define@key{Gm}{a2paper}[true]{\Gm@setpaper@ifpre{a2paper}}%
\define@key{Gm}{a3paper}[true]{\Gm@setpaper@ifpre{a3paper}}%
\define@key{Gm}{a4paper}[true]{\Gm@setpaper@ifpre{a4paper}}%
\define@key{Gm}{a5paper}[true]{\Gm@setpaper@ifpre{a5paper}}%
\define@key{Gm}{a6paper}[true]{\Gm@setpaper@ifpre{a6paper}}%
\define@key{Gm}{b0paper}[true]{\Gm@setpaper@ifpre{b0paper}}%
\define@key{Gm}{b1paper}[true]{\Gm@setpaper@ifpre{b1paper}}%
\define@key{Gm}{b2paper}[true]{\Gm@setpaper@ifpre{b2paper}}%
\define@key{Gm}{b3paper}[true]{\Gm@setpaper@ifpre{b3paper}}%
\define@key{Gm}{b4paper}[true]{\Gm@setpaper@ifpre{b4paper}}%
\define@key{Gm}{b5paper}[true]{\Gm@setpaper@ifpre{b5paper}}%
\define@key{Gm}{b6paper}[true]{\Gm@setpaper@ifpre{b6paper}}%
\define@key{Gm}{b0j}[true]{\Gm@setpaper@ifpre{b0j}}%
\define@key{Gm}{b1j}[true]{\Gm@setpaper@ifpre{b1j}}%
\define@key{Gm}{b2j}[true]{\Gm@setpaper@ifpre{b2j}}%
\define@key{Gm}{b3j}[true]{\Gm@setpaper@ifpre{b3j}}%
\define@key{Gm}{b4j}[true]{\Gm@setpaper@ifpre{b4j}}%
\define@key{Gm}{b5j}[true]{\Gm@setpaper@ifpre{b5j}}%
\define@key{Gm}{b6j}[true]{\Gm@setpaper@ifpre{b6j}}%
\define@key{Gm}{ansiapaper}[true]{\Gm@setpaper@ifpre{ansiapaper}}%
\define@key{Gm}{ansibpaper}[true]{\Gm@setpaper@ifpre{ansibpaper}}%
\define@key{Gm}{ansicpaper}[true]{\Gm@setpaper@ifpre{ansicpaper}}%
\define@key{Gm}{ansidpaper}[true]{\Gm@setpaper@ifpre{ansidpaper}}%
\define@key{Gm}{ansiepaper}[true]{\Gm@setpaper@ifpre{ansiepaper}}%
\define@key{Gm}{letterpaper}[true]{\Gm@setpaper@ifpre{letterpaper}}%
\define@key{Gm}{legalpaper}[true]{\Gm@setpaper@ifpre{legalpaper}}%
\define@key{Gm}{executivepaper}[true]{\Gm@setpaper@ifpre{executivepaper}}%
\define@key{Gm}{screen}[true]{\Gm@setpaper@ifpre{screen}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}\end{key}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{paperwidth}
%  \begin{key}{Gm}{paperheight}
%  \begin{key}{Gm}{papersize}
%    Direct specification for paper size is also possible.
%    \begin{macrocode}
\define@key{Gm}{paperwidth}{\ifGm@preamble{paperwidth}{%
  \Gm@setlength\paperwidth{#1}}}%
\define@key{Gm}{paperheight}{\ifGm@preamble{paperheight}{%
  \Gm@setlength\paperheight{#1}}}%
\define@key{Gm}{papersize}{\ifGm@preamble{papersize}{%
  \Gm@branch{#1}{paperwidth}{paperheight}}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{layout}
%  \begin{key}{Gm}{layoutwidth}
%  \begin{key}{Gm}{layoutheight}
%  \begin{key}{Gm}{layoutsize}
%    Direct specification for layout size is also possible.
%    \begin{macrocode}
\define@key{Gm}{layout}{\Gm@layouttrue\@nameuse{Gm@#1}{Gm@layout}}%
\let\KV@Gm@layoutname\KV@Gm@layout
\define@key{Gm}{layoutwidth}{\Gm@layouttrue\Gm@setlength\Gm@layoutwidth{#1}}%
\define@key{Gm}{layoutheight}{\Gm@layouttrue\Gm@setlength\Gm@layoutheight{#1}}%
\define@key{Gm}{layoutsize}{\Gm@branch{#1}{layoutwidth}{layoutheight}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}
%  \begin{key}{Gm}{landscape}
%  \begin{key}{Gm}{portrait}
%    Paper orientation setting.
%    \begin{macrocode}
\define@key{Gm}{landscape}[true]{\ifGm@preamble{landscape}{%
  \Gm@doifelse{landscape}{#1}%
  {\ifGm@landscape\else\Gm@landscapetrue\Gm@reverse{swap@papersize}\fi}%
  {\ifGm@landscape\Gm@landscapefalse\Gm@reverse{swap@papersize}\fi}}}%
\define@key{Gm}{portrait}[true]{\ifGm@preamble{portrait}{%
  \Gm@doifelse{portrait}{#1}%
  {\ifGm@landscape\Gm@landscapefalse\Gm@reverse{swap@papersize}\fi}%
  {\ifGm@landscape\else\Gm@landscapetrue\Gm@reverse{swap@papersize}\fi}}}%
%    \end{macrocode}
%  \end{key}\end{key}
%  \begin{key}{Gm}{hscale}
%  \begin{key}{Gm}{vscale}
%  \begin{key}{Gm}{scale}
%    These options can determine the length(s) of \gpart{total body}
%    giving \textit{scale(s)} against the paper size.
%    \begin{macrocode}
\define@key{Gm}{hscale}{\Gm@hbodytrue\edef\Gm@hscale{#1}}%
\define@key{Gm}{vscale}{\Gm@vbodytrue\edef\Gm@vscale{#1}}%
\define@key{Gm}{scale}{\Gm@branch{#1}{hscale}{vscale}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{width}
%  \begin{key}{Gm}{height}
%  \begin{key}{Gm}{total}
%  \begin{key}{Gm}{totalwidth}
%  \begin{key}{Gm}{totalheight}
%    These options give concrete dimension(s) of \gpart{total body}.
%    |totalwidth| and |totalheight| are aliases of |width| and |height|
%    respectively.
%    \begin{macrocode}
\define@key{Gm}{width}{\Gm@hbodytrue\Gm@defbylen{width}{#1}}%
\define@key{Gm}{height}{\Gm@vbodytrue\Gm@defbylen{height}{#1}}%
\define@key{Gm}{total}{\Gm@branch{#1}{width}{height}}%
\let\KV@Gm@totalwidth\KV@Gm@width
\let\KV@Gm@totalheight\KV@Gm@height
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}\end{key}
%  \begin{key}{Gm}{textwidth}
%  \begin{key}{Gm}{textheight}
%  \begin{key}{Gm}{text}
%  \begin{key}{Gm}{body}
%    These options directly sets the dimensions \cs{textwidth} and
%    \cs{textheight}. |body| is an alias of |text|.
%    \begin{macrocode}
\define@key{Gm}{textwidth}{\Gm@hbodytrue\Gm@defbylen{textwidth}{#1}}%
\define@key{Gm}{textheight}{\Gm@vbodytrue\Gm@defbylen{textheight}{#1}}%
\define@key{Gm}{text}{\Gm@branch{#1}{textwidth}{textheight}}%
\let\KV@Gm@body\KV@Gm@text
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}
%  \begin{key}{Gm}{lines}
%    The option sets \cs{textheight} with the number of lines.
%    \begin{macrocode}
\define@key{Gm}{lines}{\Gm@vbodytrue\Gm@defbycnt{lines}{#1}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{includehead}
%  \begin{key}{Gm}{includefoot}
%  \begin{key}{Gm}{includeheadfoot}
%  \begin{key}{Gm}{includemp}
%  \begin{key}{Gm}{includeall}
%    The options take the corresponding dimensions as part of
%    \gpart{body}.
%    \begin{macrocode}
\define@key{Gm}{includehead}[true]{\Gm@setbool{includehead}{#1}}%
\define@key{Gm}{includefoot}[true]{\Gm@setbool{includefoot}{#1}}%
\define@key{Gm}{includeheadfoot}[true]{\Gm@doifelse{includeheadfoot}{#1}%
  {\Gm@includeheadtrue\Gm@includefoottrue}%
  {\Gm@includeheadfalse\Gm@includefootfalse}}%
\define@key{Gm}{includemp}[true]{\Gm@setbool{includemp}{#1}}%
\define@key{Gm}{includeall}[true]{\Gm@doifelse{includeall}{#1}%
  {\Gm@includeheadtrue\Gm@includefoottrue\Gm@includemptrue}%
  {\Gm@includeheadfalse\Gm@includefootfalse\Gm@includempfalse}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}\end{key}
%  \begin{key}{Gm}{ignorehead}
%  \begin{key}{Gm}{ignorefoot}
%  \begin{key}{Gm}{ignoreheadfoot}
%  \begin{key}{Gm}{ignoremp}
%  \begin{key}{Gm}{ignoreall}
%  These options exclude \gpart{head}, \gpart{foot}
%  and \gpart{marginpars} when determining \gpart{body}.
%    \begin{macrocode}
\define@key{Gm}{ignorehead}[true]{%
  \Gm@setboolrev[ignorehead]{includehead}{#1}}%
\define@key{Gm}{ignorefoot}[true]{%
  \Gm@setboolrev[ignorefoot]{includefoot}{#1}}%
\define@key{Gm}{ignoreheadfoot}[true]{\Gm@doifelse{ignoreheadfoot}{#1}%
  {\Gm@includeheadfalse\Gm@includefootfalse}%
  {\Gm@includeheadtrue\Gm@includefoottrue}}%
\define@key{Gm}{ignoremp}[true]{%
  \Gm@setboolrev[ignoremp]{includemp}{#1}}%
\define@key{Gm}{ignoreall}[true]{\Gm@doifelse{ignoreall}{#1}%
  {\Gm@includeheadfalse\Gm@includefootfalse\Gm@includempfalse}%
  {\Gm@includeheadtrue\Gm@includefoottrue\Gm@includemptrue}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}\end{key}
%  \begin{key}{Gm}{heightrounded}
%    The option rounds \cs{textheight} to n-times of \cs{baselineskip}
%    plus \cs{topskip}.
%    \begin{macrocode}
\define@key{Gm}{heightrounded}[true]{\Gm@setbool{heightrounded}{#1}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{hdivide}
%  \begin{key}{Gm}{vdivide}
%  \begin{key}{Gm}{divide}
%    The options are useful to specify partitioning
%    in each direction of the paper.
%    \begin{macrocode}
\define@key{Gm}{hdivide}{\Gm@parse@divide{#1}{lmargin}{width}{rmargin}}%
\define@key{Gm}{vdivide}{\Gm@parse@divide{#1}{tmargin}{height}{bmargin}}%
\define@key{Gm}{divide}{\Gm@parse@divide{#1}{lmargin}{width}{rmargin}%
  \Gm@parse@divide{#1}{tmargin}{height}{bmargin}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%
%  \begin{key}{Gm}{lmargin}
%  \begin{key}{Gm}{rmargin}
%  \begin{key}{Gm}{tmargin}
%  \begin{key}{Gm}{bmargin}
%  \begin{key}{Gm}{left}
%  \begin{key}{Gm}{inner}
%  \begin{key}{Gm}{innermargin}
%  \begin{key}{Gm}{right}
%  \begin{key}{Gm}{outer}
%  \begin{key}{Gm}{outermargin}
%  \begin{key}{Gm}{top}
%  \begin{key}{Gm}{bottom}
%    These options set \gpart{margins}.
%    |left|, |inner|, |innermargin| are aliases of |lmargin|.
%    |right|, |outer|, |outermargin| are aliases of |rmargin|.
%    |top| and |bottom| are aliases of |tmargin| and |bmargin| respectively.
%    \begin{macrocode}
\define@key{Gm}{lmargin}{\Gm@defbylen{lmargin}{#1}}%
\define@key{Gm}{rmargin}{\Gm@defbylen{rmargin}{#1}}%
\let\KV@Gm@left\KV@Gm@lmargin
\let\KV@Gm@inner\KV@Gm@lmargin
\let\KV@Gm@innermargin\KV@Gm@lmargin
\let\KV@Gm@right\KV@Gm@rmargin
\let\KV@Gm@outer\KV@Gm@rmargin
\let\KV@Gm@outermargin\KV@Gm@rmargin
\define@key{Gm}{tmargin}{\Gm@defbylen{tmargin}{#1}}%
\define@key{Gm}{bmargin}{\Gm@defbylen{bmargin}{#1}}%
\let\KV@Gm@top\KV@Gm@tmargin
\let\KV@Gm@bottom\KV@Gm@bmargin
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}\end{key}
%  \end{key}\end{key}\end{key}\end{key}\end{key}
%  \end{key}\end{key}
%  \begin{key}{Gm}{hmargin}
%  \begin{key}{Gm}{vmargin}
%  \begin{key}{Gm}{margin}
%  These options are shorthands for setting \gpart{margins}.
%    \begin{macrocode}
\define@key{Gm}{hmargin}{\Gm@branch{#1}{lmargin}{rmargin}}%
\define@key{Gm}{vmargin}{\Gm@branch{#1}{tmargin}{bmargin}}%
\define@key{Gm}{margin}{\Gm@branch{#1}{lmargin}{tmargin}%
  \Gm@branch{#1}{rmargin}{bmargin}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{hmarginratio}
%  \begin{key}{Gm}{vmarginratio}
%  \begin{key}{Gm}{marginratio}
%  \begin{key}{Gm}{hratio}
%  \begin{key}{Gm}{vratio}
%  \begin{key}{Gm}{ratio}
%  Options specifying the margin ratios.
%    \begin{macrocode}
\define@key{Gm}{hmarginratio}{\edef\Gm@hmarginratio{#1}}%
\define@key{Gm}{vmarginratio}{\edef\Gm@vmarginratio{#1}}%
\define@key{Gm}{marginratio}{\Gm@branch{#1}{hmarginratio}{vmarginratio}}%
\let\KV@Gm@hratio\KV@Gm@hmarginratio
\let\KV@Gm@vratio\KV@Gm@vmarginratio
\let\KV@Gm@ratio\KV@Gm@marginratio
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{hcentering}
%  \begin{key}{Gm}{vcentering}
%  \begin{key}{Gm}{centering}
%    Useful shorthands to place \gpart{body} centered.
%    \begin{macrocode}
\define@key{Gm}{hcentering}[true]{\Gm@doifelse{hcentering}{#1}%
  {\def\Gm@hmarginratio{1:1}}{}}%
\define@key{Gm}{vcentering}[true]{\Gm@doifelse{vcentering}{#1}%
  {\def\Gm@vmarginratio{1:1}}{}}%
\define@key{Gm}{centering}[true]{\Gm@doifelse{centering}{#1}%
  {\def\Gm@hmarginratio{1:1}\def\Gm@vmarginratio{1:1}}{}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{twoside}
%    If |twoside=true|, \cs{@twoside} and \cs{@mparswitch} is set to |true|.
%    \begin{macrocode}
\define@key{Gm}{twoside}[true]{\Gm@doifelse{twoside}{#1}%
  {\@twosidetrue\@mparswitchtrue}{\@twosidefalse\@mparswitchfalse}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{asymmetric}
%    |asymmetric| sets \cs{@mparswitchfalse} and \cs{@twosidetrue}
%     A |asymmetric=false| has no effect.
%    \begin{macrocode}
\define@key{Gm}{asymmetric}[true]{\Gm@doifelse{asymmetric}{#1}%
  {\@twosidetrue\@mparswitchfalse}{}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{bindingoffset}
%    The macro adds the specified space to the inner margin.
%    \begin{macrocode}
\define@key{Gm}{bindingoffset}{\Gm@setlength\Gm@bindingoffset{#1}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{headheight}
%  \begin{key}{Gm}{headsep}
%  \begin{key}{Gm}{footskip}
%  \begin{key}{Gm}{head}
%  \begin{key}{Gm}{foot}
%    The direct settings of \gpart{head} and/or \gpart{foot} dimensions.
%    \begin{macrocode}
\define@key{Gm}{headheight}{\Gm@setlength\headheight{#1}}%
\define@key{Gm}{headsep}{\Gm@setlength\headsep{#1}}%
\define@key{Gm}{footskip}{\Gm@setlength\footskip{#1}}%
\let\KV@Gm@head\KV@Gm@headheight
\let\KV@Gm@foot\KV@Gm@footskip
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}\end{key}
%  \begin{key}{Gm}{nohead}
%  \begin{key}{Gm}{nofoot}
%  \begin{key}{Gm}{noheadfoot}
%    They are only shorthands to set \gpart{head} and/or \gpart{foot}
%    to be |0pt|.
%    \begin{macrocode}
\define@key{Gm}{nohead}[true]{\Gm@doifelse{nohead}{#1}%
  {\Gm@setlength\headheight\z@\Gm@setlength\headsep\z@}{}}%
\define@key{Gm}{nofoot}[true]{\Gm@doifelse{nofoot}{#1}%
  {\Gm@setlength\footskip\z@}{}}%
\define@key{Gm}{noheadfoot}[true]{\Gm@doifelse{noheadfoot}{#1}%
  {\Gm@setlength\headheight\z@\Gm@setlength\headsep
  \z@\Gm@setlength\footskip\z@}{}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{footnotesep}
%    The option directly sets a native dimension \cs{footnotesep}.
%    \begin{macrocode}
\define@key{Gm}{footnotesep}{\Gm@setlength{\skip\footins}{#1}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{marginparwidth}
%  \begin{key}{Gm}{marginpar}
%  \begin{key}{Gm}{marginparsep}
%    They directly set native dimensions \cs{marginparwidth} and
%    \cs{marginparsep}.
%    \begin{macrocode}
\define@key{Gm}{marginparwidth}{\Gm@setlength\marginparwidth{#1}}%
\let\KV@Gm@marginpar\KV@Gm@marginparwidth
\define@key{Gm}{marginparsep}{\Gm@setlength\marginparsep{#1}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{nomarginpar}
%    The macro is a shorthand for \cs{marginparwidth}|=0pt| and
%    \cs{marginparsep}|=0pt|.
%    \begin{macrocode}
\define@key{Gm}{nomarginpar}[true]{\Gm@doifelse{nomarginpar}{#1}%
  {\Gm@setlength\marginparwidth\z@\Gm@setlength\marginparsep\z@}{}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{columnsep}
%    The option sets a native dimension \cs{columnsep}.
%    \begin{macrocode}
\define@key{Gm}{columnsep}{\Gm@setlength\columnsep{#1}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{hoffset}
%  \begin{key}{Gm}{voffset}
%  \begin{key}{Gm}{offset}
%    The former two options set native dimensions \cs{hoffset} and
%    \cs{voffset}. |offset| can set both of them with the same value.
%    \begin{macrocode}
\define@key{Gm}{hoffset}{\Gm@setlength\hoffset{#1}}%
\define@key{Gm}{voffset}{\Gm@setlength\voffset{#1}}%
\define@key{Gm}{offset}{\Gm@branch{#1}{hoffset}{voffset}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{layouthoffset}
%  \begin{key}{Gm}{layoutvoffset}
%  \begin{key}{Gm}{layoutoffset}
%    \begin{macrocode}
\define@key{Gm}{layouthoffset}{\Gm@setlength\Gm@layouthoffset{#1}}%
\define@key{Gm}{layoutvoffset}{\Gm@setlength\Gm@layoutvoffset{#1}}%
\define@key{Gm}{layoutoffset}{\Gm@branch{#1}{layouthoffset}{layoutvoffset}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}
%  \begin{key}{Gm}{twocolumn}
%    The option sets \cs{twocolumn} switch.
%    \begin{macrocode}
\define@key{Gm}{twocolumn}[true]{%
  \Gm@doif{twocolumn}{#1}{\csname @twocolumn\Gm@bool\endcsname}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{reversemp}
%  \begin{key}{Gm}{reversemarginpar}
%    The both options set \cs{reversemargin}.
%    \begin{macrocode}
\define@key{Gm}{reversemp}[true]{%
  \Gm@doif{reversemp}{#1}{\csname @reversemargin\Gm@bool\endcsname}}%
\define@key{Gm}{reversemarginpar}[true]{%
  \Gm@doif{reversemarginpar}{#1}{\csname @reversemargin\Gm@bool\endcsname}}%
%    \end{macrocode}
%  \end{key}\end{key}
%  \begin{key}{Gm}{dviver}
%    \begin{macrocode}
\define@key{Gm}{driver}{\ifGm@preamble{driver}{%
  \edef\@@tempa{#1}\edef\@@auto{auto}\edef\@@none{none}%
  \ifx\@@tempa\@empty\let\Gm@driver\relax\else
  \ifx\@@tempa\@@none\let\Gm@driver\relax\else
  \ifx\@@tempa\@@auto\let\Gm@driver\@empty\else
  \setkeys{Gm}{#1}\fi\fi\fi\let\@@auto\relax\let\@@none\relax}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{dvips}
%  \begin{key}{Gm}{dvipdfm}
%  \begin{key}{Gm}{pdftex}
%  \begin{key}{Gm}{xetex}
%  \begin{key}{Gm}{vtex}
%    The \Gm\ package supports |dvips|, |dvipdfm|, 
%    |pdflatex| and |vtex|. |dvipdfm| works like |dvips|.
%    \begin{macrocode}
\define@key{Gm}{dvips}[true]{\ifGm@preamble{dvips}{%
  \Gm@doifelse{dvips}{#1}{\Gm@setdriver{dvips}}{\Gm@unsetdriver{dvips}}}}%
\define@key{Gm}{dvipdfm}[true]{\ifGm@preamble{dvipdfm}{%
  \Gm@doifelse{dvipdfm}{#1}{\Gm@setdriver{dvipdfm}}{\Gm@unsetdriver{dvipdfm}}}}%
\define@key{Gm}{pdftex}[true]{\ifGm@preamble{pdftex}{%
  \Gm@doifelse{pdftex}{#1}{\Gm@setdriver{pdftex}}{\Gm@unsetdriver{pdftex}}}}%
\define@key{Gm}{xetex}[true]{\ifGm@preamble{xetex}{%
  \Gm@doifelse{xetex}{#1}{\Gm@setdriver{xetex}}{\Gm@unsetdriver{xetex}}}}%
\define@key{Gm}{vtex}[true]{\ifGm@preamble{vtex}{%
  \Gm@doifelse{vtex}{#1}{\Gm@setdriver{vtex}}{\Gm@unsetdriver{vtex}}}}%
%    \end{macrocode}
%  \end{key}\end{key}\end{key}\end{key}\end{key}
%  \begin{key}{Gm}{verbose}
%    The verbose mode.
%    \begin{macrocode}
\define@key{Gm}{verbose}[true]{\ifGm@preamble{verbose}{\Gm@setbool{verbose}{#1}}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{reset}
%    The option cancels all the options specified before |reset|,
%    except |pass|. |mag| ($\neq1000$) with |truedimen| cannot be also
%    reset.
%    \begin{macrocode}
\define@key{Gm}{reset}[true]{\ifGm@preamble{reset}{%
  \Gm@doifelse{reset}{#1}{\Gm@restore@org\Gm@initall
  \ProcessOptionsKV[c]{Gm}\Gm@setdefaultpaper}{}}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{resetpaper}
%    If |resetpaper| is set to |true|, the paper size redefined in the package
%    is discarded and the original one is restored. This option may be useful
%    to print nonstandard sized documents with normal printers and papers.
%    \begin{macrocode}
\define@key{Gm}{resetpaper}[true]{\ifGm@preamble{resetpaper}{%
  \Gm@setbool{resetpaper}{#1}}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{mag}
%    |mag| is expanded immediately when it is specified. So |reset| can't
%    reset |mag| when it is set with |truedimen|.
%    \begin{macrocode}
\define@key{Gm}{mag}{\ifGm@preamble{mag}{\mag=#1}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{truedimen}
%    If |truedimen| is set to |true|, all of the internal explicit dimensions
%    is changed to \textit{true} dimensions, e.g., |1in| is changed to
%    |1truein|.
%    \begin{macrocode}
\define@key{Gm}{truedimen}[true]{\ifGm@preamble{truedimen}{%
  \Gm@doifelse{truedimen}{#1}{\let\Gm@truedimen\Gm@true}%
  {\let\Gm@truedimen\@empty}}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{pass}
%    The option makes all the options specified ineffective except
%    verbose switch.
%    \begin{macrocode}
\define@key{Gm}{pass}[true]{\ifGm@preamble{pass}{\Gm@setbool{pass}{#1}}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{showframe}
%    The showframe option.
%    \begin{macrocode}
\define@key{Gm}{showframe}[true]{\Gm@setbool{showframe}{#1}}%
%    \end{macrocode}
%  \end{key}
%  \begin{key}{Gm}{showcrop}
%    The showcrop option.
%    \begin{macrocode}
\define@key{Gm}{showcrop}[true]{\Gm@setbool{showcrop}{#1}}%
%    \end{macrocode}
%  \end{key}
%    \begin{macro}{\Gm@setdefaultpaper}
%    The macro stores paper dimensions.
%    This macro should be called after |\ProcessOptionsKV[c]{Gm}|.
%    If the |landscape| option in |\documentclass| is
%    specified, the class immediately swaps the paper dimensions.
%    \begin{macrocode}
\def\Gm@setdefaultpaper{%
  \ifx\Gm@paper\@undefined
    \Gm@setsize{paper}(\strip@pt\paperwidth,\strip@pt\paperheight){pt}%
    \Gm@setsize{Gm@layout}(\strip@pt\paperwidth,\strip@pt\paperheight){pt}%
    \Gm@swap@papersizefalse
  \fi}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@adjustpaper}
%    The macro checks if paperwidth/height is larger than 0pt,
%    which is used in \cs{Gm@process}.
%    The paper dimensions can be swapped when paper orientation
%    is changed over by |landscape| and |portrait| options.
%    \begin{macrocode}
\def\Gm@adjustpaper{%
  \ifdim\paperwidth>\p@\else
    \PackageError{geometry}{%
    \string\paperwidth\space(\the\paperwidth) too short}{%
    Set a paper type (e.g., `a4paper').}%
  \fi
  \ifdim\paperheight>\p@\else
    \PackageError{geometry}{%
    \string\paperheight\space(\the\paperheight) too short}{%
    Set a paper type (e.g., `a4paper').}%
  \fi
  \ifGm@swap@papersize
    \setlength\@tempdima{\paperwidth}%
    \setlength\paperwidth{\paperheight}%
    \setlength\paperheight{\@tempdima}%
  \fi
  \ifGm@layout\else
    \let\Gm@layoutwidth\paperwidth
    \let\Gm@layoutheight\paperheight
  \fi}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@checkmp}
%    The macro checks whether or not marginpars overrun the page.
%    \begin{macrocode}
\def\Gm@checkmp{%
  \ifGm@includemp\else
    \@tempcnta\z@\@tempcntb\@ne
    \if@twocolumn
      \@tempcnta\@ne
    \else
      \if@reversemargin
        \@tempcnta\@ne\@tempcntb\z@
      \fi
    \fi
    \@tempdima\marginparwidth
    \advance\@tempdima\marginparsep
    \ifnum\@tempcnta=\@ne
      \@tempdimc\@tempdima
      \setlength\@tempdimb{\Gm@lmargin}%
      \advance\@tempdimc-\@tempdimb
      \ifdim\@tempdimc>\z@
        \Gm@warning{The marginal notes overrun the paper edge.^^J
           \@spaces Add \the\@tempdimc\space and more to the left margin}%
      \fi
    \fi
    \ifnum\@tempcntb=\@ne
      \@tempdimc\@tempdima
      \setlength\@tempdimb{\Gm@rmargin}%
      \advance\@tempdimc-\@tempdimb
      \ifdim\@tempdimc>\z@
        \Gm@warning{The marginal notes overrun the paper.^^J
           \@spaces Add \the\@tempdimc\space and more to the right margin}%
      \fi
    \fi
  \fi}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@adjustmp}
%    The macro sets marginpar correction when |includemp| is set,
%    which is used in \cs{Gm@process}.
%    Local variables \cs{Gm@wd@mp}, \cs{Gm@odd@mp} and \cs{Gm@even@mp}
%    are set here. Note that \cs{Gm@even@mp} should be used only for twoside
%    layout.
%    \begin{macrocode}
\def\Gm@adjustmp{%
  \ifGm@includemp
    \@tempdimb\marginparwidth
    \advance\@tempdimb\marginparsep
    \Gm@wd@mp\@tempdimb
    \Gm@odd@mp\z@
    \Gm@even@mp\z@
    \if@twocolumn
      \Gm@wd@mp2\@tempdimb
      \Gm@odd@mp\@tempdimb
      \Gm@even@mp\@tempdimb
    \else
      \if@reversemargin
        \Gm@odd@mp\@tempdimb
        \if@mparswitch\else
          \Gm@even@mp\@tempdimb
        \fi
      \else
        \if@mparswitch
          \Gm@even@mp\@tempdimb
        \fi
      \fi
    \fi
  \fi}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@adjustbody}
%    If the horizontal dimension of \gpart{body} is specified by user,
%    \cs{Gm@width} is set properly here.
%    \begin{macrocode}
\def\Gm@adjustbody{
  \ifGm@hbody
    \ifx\Gm@width\@undefined
      \ifx\Gm@hscale\@undefined
        \edef\Gm@width{\Gm@Dhscale\Gm@layoutwidth}%
      \else
        \edef\Gm@width{\Gm@hscale\Gm@layoutwidth}%
      \fi
    \fi
    \ifx\Gm@textwidth\@undefined\else
      \setlength\@tempdima{\Gm@textwidth}%
      \ifGm@includemp
        \advance\@tempdima\Gm@wd@mp
      \fi
      \edef\Gm@width{\the\@tempdima}%
    \fi
  \fi
%    \end{macrocode}
%    \end{macro}
%
%    If the vertical dimension of \gpart{body} is specified by user,
%    \cs{Gm@height} is set properly here.
%    \begin{macrocode}
  \ifGm@vbody
    \ifx\Gm@height\@undefined
      \ifx\Gm@vscale\@undefined
        \edef\Gm@height{\Gm@Dvscale\Gm@layoutheight}%
      \else
        \edef\Gm@height{\Gm@vscale\Gm@layoutheight}%
      \fi
    \fi
    \ifx\Gm@lines\@undefined\else
%    \end{macrocode}
%    \cs{topskip} has to be adjusted so that the formula
%    ``$\cs{textheight} = (lines - 1) \times \cs{baselineskip} + \cs{topskip}$''
%    to be correct even if large font sizes are specified by users.
%    If \cs{topskip} is smaller than \cs{ht}\cs{strutbox}, then \cs{topskip}
%    is set to \cs{ht}\cs{strutbox}.
%    \begin{macrocode}
      \ifdim\topskip<\ht\strutbox
        \setlength\@tempdima{\topskip}%
        \setlength\topskip{\ht\strutbox}%
        \Gm@warning{\noexpand\topskip was changed from \the\@tempdima\space
        to \the\topskip}%
      \fi
      \setlength\@tempdima{\baselineskip}%
      \multiply\@tempdima\Gm@lines
      \addtolength\@tempdima{\topskip}%
      \addtolength\@tempdima{-\baselineskip}%
      \edef\Gm@textheight{\the\@tempdima}%
    \fi
    \ifx\Gm@textheight\@undefined\else
      \setlength\@tempdima{\Gm@textheight}%
      \ifGm@includehead
        \addtolength\@tempdima{\headheight}%
        \addtolength\@tempdima{\headsep}%
      \fi
      \ifGm@includefoot
        \addtolength\@tempdima{\footskip}%
      \fi
      \edef\Gm@height{\the\@tempdima}%
    \fi
  \fi}%
%    \end{macrocode}
%
%    \begin{macro}{\Gm@process}
%    The main macro processing specified layout dimensions is defined.
%    \begin{macrocode}
\def\Gm@process{%
%    \end{macrocode}
%    If |pass| is set, the original dimensions and switches are restored
%    and process is ended here.
%    \begin{macrocode}
  \ifGm@pass
    \Gm@restore@org
  \else
    \Gm@@process
  \fi}%
%    \end{macrocode}
%    The main processing macro.
%    \begin{macrocode}
\def\Gm@@process{%
  \Gm@expandlengths
  \Gm@adjustpaper
  \addtolength\Gm@layoutwidth{-\Gm@bindingoffset}%
  \Gm@adjustmp
  \Gm@adjustbody
  \Gm@detall{h}{width}{lmargin}{rmargin}%
  \Gm@detall{v}{height}{tmargin}{bmargin}%
%    \end{macrocode}
%    The real dimensions are set properly according to the result
%    of the auto-completion calculation.
%    \begin{macrocode}
  \setlength\textwidth{\Gm@width}%
  \setlength\textheight{\Gm@height}%
  \setlength\topmargin{\Gm@tmargin}%
  \setlength\oddsidemargin{\Gm@lmargin}%
  \addtolength\oddsidemargin{-1\Gm@truedimen in}%
%    \end{macrocode}
%    If |includemp| is set to |true|, \cs{textwidth} and \cs{oddsidemargin}
%    are adjusted. 
%    \begin{macrocode}
  \ifGm@includemp
    \advance\textwidth-\Gm@wd@mp
    \advance\oddsidemargin\Gm@odd@mp
  \fi
%    \end{macrocode}
%    Determining \cs{evensidemargin}.
%    In the twoside page layout, the right margin value \cs{Gm@rmargin} is used.
%    If the marginal note width is included,
%    \cs{evensidemargin} should be corrected by \cs{Gm@even@mp}.
%    \begin{macrocode}
  \if@mparswitch
    \setlength\evensidemargin{\Gm@rmargin}%
    \addtolength\evensidemargin{-1\Gm@truedimen in}%
    \ifGm@includemp
      \advance\evensidemargin\Gm@even@mp
    \fi
  \else
    \evensidemargin\oddsidemargin
  \fi
%    \end{macrocode}
%    The bindingoffset correction for \cs{oddsidemargin}.
%    \begin{macrocode}
  \advance\oddsidemargin\Gm@bindingoffset
  \addtolength\topmargin{-1\Gm@truedimen in}%
%    \end{macrocode}
%    If the head of the page is included in \gpart{total body}, 
%    \cs{headheight} and \cs{headsep} are removed from \cs{textheight},
%    otherwise from \cs{topmargin}.
%    \begin{macrocode}
  \ifGm@includehead
    \addtolength\textheight{-\headheight}%
    \addtolength\textheight{-\headsep}%
  \else
    \addtolength\topmargin{-\headheight}%
    \addtolength\topmargin{-\headsep}%
  \fi
%    \end{macrocode}
%    If the foot of the page is included in \gpart{total body},
%    \cs{footskip} is removed from \cs{textheight}.
%    \begin{macrocode}
  \ifGm@includefoot
    \addtolength\textheight{-\footskip}%
  \fi
%    \end{macrocode}
%    If |heightrounded| is set, \cs{textheight} is rounded.
%    \begin{macrocode}
  \ifGm@heightrounded
    \setlength\@tempdima{\textheight}%
    \addtolength\@tempdima{-\topskip}%
    \@tempcnta\@tempdima
    \@tempcntb\baselineskip
    \divide\@tempcnta\@tempcntb
    \setlength\@tempdimb{\baselineskip}%
    \multiply\@tempdimb\@tempcnta
    \advance\@tempdima-\@tempdimb
    \multiply\@tempdima\tw@
    \ifdim\@tempdima>\baselineskip
      \addtolength\@tempdimb{\baselineskip}%
    \fi
    \addtolength\@tempdimb{\topskip}%
    \textheight\@tempdimb
  \fi
%    \end{macrocode}
%    The paper width is set back by adding \cs{Gm@bindingoffset}.
%    \begin{macrocode}
  \advance\oddsidemargin\Gm@layouthoffset%
  \advance\evensidemargin\Gm@layouthoffset%
  \advance\topmargin\Gm@layoutvoffset%
  \addtolength\Gm@layoutwidth{\Gm@bindingoffset}%
  }% end of \Gm@@process
%    \end{macrocode}
%    \end{macro}
%    
%    \begin{macro}{\Gm@detectdriver}
%    The macro checks the typeset environment and changes the driver option
%    if necessary. To make the engine detection more robust, the macro is
%    rewritten in the version 4 with packages \textsf{ifpdf} and \textsf{ifvtex}.
%    \begin{macrocode}
\def\Gm@detectdriver{%
%    \end{macrocode} 
%    If the driver option is not specified explicitly, then driver
%    auto-detection works.
%    \begin{macrocode} 
  \ifx\Gm@driver\@empty
    \typeout{*geometry* driver: auto-detecting}%
%    \end{macrocode} 
%    \cs{ifpdf} is defined in \textsf{ifpdf} package in `oberdiek' bundle.
%    \begin{macrocode} 
    \ifpdf
      \Gm@setdriver{pdftex}%
    \else
      \Gm@setdriver{dvips}%
    \fi
%    \end{macrocode} 
%    \cs{ifvtex} is defined in \textsf{ifvtex} package in `oberdiek'
%    bundle. 
%    \begin{macrocode} 
    \ifvtex
      \Gm@setdriver{vtex}%
    \fi
%    \end{macrocode}
%    xetex
%    \begin{macrocode} 
    \@ifundefined{XeTeXversion}{}{\Gm@setdriver{xetex}}%
%    \end{macrocode}
%    When the driver option is set by the user, check if it is valid or not. 
%    \begin{macrocode} 
  \else
    \ifx\Gm@driver\Gm@xetex %%
      \@ifundefined{XeTeXversion}{\Gm@warning{%
            Wrong driver setting: `xetex'; trying `pdftex' driver}%
            \Gm@setdriver{pdftex}}{}%
    \fi
    \ifx\Gm@driver\Gm@vtex
      \ifvtex\else
        \Gm@warning{Wrong driver setting: `vtex'; trying `dvips' driver}%
        \Gm@setdriver{dvips}%
      \fi
    \fi
  \fi
  \ifx\Gm@driver\relax
    \typeout{*geometry* detected driver: <none>}%
  \else
    \typeout{*geometry* detected driver: \Gm@driver}%
  \fi}%
%    \end{macrocode}
%    \end{macro}
%    
%    \begin{macro}{\Gm@showparams}
%    Prints the resulted parammeters and dimensions to STDOUT
%    if |verbose| is true.
%    |\Gm@width| and |\Gm@height| are expanded to get the real size.
%    \begin{macrocode}
\def\Gm@showparams#1{%
  \ifGm@pass\else
   \setlength\@tempdima{\Gm@width}\edef\Gm@width{\the\@tempdima}%
   \setlength\@tempdima{\Gm@height}\edef\Gm@height{\the\@tempdima}%
  \fi
  \ifGm@verbose\expandafter\typeout\else\expandafter\wlog\fi
  {\Gm@logcontent{#1}}}%
\def\Gm@showbool#1{\@nameuse{ifGm@#1}#1\space\fi}%
\def\Gm@showdim#1{*gm \string#1=\the#1^^J}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\Gm@logcontent}
%    The content of geometry paramenters and native dimensions for the
%    page layout.
%    \begin{macrocode}
\def\Gm@logcontent#1{%
  *geometry* verbose: parameters #1^^J%
  \ifGm@pass *gm: pass (ignores the geometry layout)^^J%
  \else
  \if\Gm@driver\relax *gm driver: <none>^^J\else *gm driver: \Gm@driver^^J\fi
  \ifx\Gm@paper\@undefined *gm paper: \the\paperwidth, \the\paperheight^^J%
  \else *gm paper: \Gm@paper^^J\fi
  \ifGm@layout *gm layout: \the\Gm@layoutwidth, \the\Gm@layoutheight^^J%
  \else *gm layout: (same as paper)^^J\fi
  \@ifundefined{Gm@lines}{}{*gm lines: \Gm@lines^^J}%
  \@ifundefined{Gm@hmarginratio}{}{*gm hratio: \Gm@hmarginratio^^J}%
  \@ifundefined{Gm@vmarginratio}{}{*gm vratio: \Gm@vmarginratio^^J}%
  \ifdim\Gm@bindingoffset=\z@\else *gm bindingoffset: \the\Gm@bindingoffset^^J\fi
  *gm L,W,R: \Gm@lmargin, \Gm@width, \Gm@rmargin^^J%
  *gm T,H,B: \Gm@tmargin, \Gm@height, \Gm@bmargin^^J%
  *gm switch-on: %
   \Gm@showbool{landscape}%
   \Gm@showbool{includehead}%
   \Gm@showbool{includefoot}%
   \Gm@showbool{includemp}%
   \if@twoside twoside\space\fi%
   \if@mparswitch\else\if@twoside asymmetric\space\fi\fi%
   \Gm@showbool{heightrounded}%
   \ifx\Gm@truedimen\@empty\else *gm truedimen\space\fi%
  ^^J%
  \fi
  \Gm@showdim{\paperwidth}%
  \Gm@showdim{\paperheight}%
  \Gm@showdim{\textwidth}%
  \Gm@showdim{\textheight}%
  \Gm@showdim{\oddsidemargin}%
  \Gm@showdim{\evensidemargin}%
  \Gm@showdim{\topmargin}%
  \Gm@showdim{\headheight}%
  \Gm@showdim{\headsep}%
  \Gm@showdim{\footskip}%
  \Gm@showdim{\marginparwidth}%
  \Gm@showdim{\marginparsep}%
  \Gm@showdim{\columnsep}%
  *gm \string\skip\string\footins=\the\skip\footins^^J%
  \Gm@showdim{\hoffset}%
  \Gm@showdim{\voffset}%
  \Gm@showdim{\mag}%
  \if@twocolumn *gm\space\string\@twocolumntrue^^J\fi%
  \if@twoside *gm\space\string\@twosidetrue^^J\fi%
  \if@mparswitch *gm\space\string\@mparswitchtrue^^J\fi%
  \if@reversemargin *gm\space\string\@reversemargintrue^^J\fi%
  *gm (1in=72.27pt, 1cm=28.4528pt)}%
%    \end{macrocode}
%    \end{macro}
%
%    macros for frames and cropmarks
%    \begin{macrocode}
\def\Gm@cropmark(#1,#2,#3,#4){%
  \begin{picture}(0,0)
    \setlength\unitlength{1truemm}\thinlines
    \put(0,0){\line(#1,#2){5}}
    \put(0,0){\line(#3,#4){5}}
  \end{picture}}%
\newcommand*{\Gm@vrules@mpi}{%
  \hb@xt@\@tempdima{\llap{\vrule height\textheight}\ignorespaces
  \hskip \textwidth\vrule height\textheight\hskip \marginparsep
  \llap{\vrule height\textheight}\hfil\vrule height\textheight}}%
\newcommand*{\Gm@vrules@mpii}{%
  \hb@xt@\@tempdima{\hskip-\marginparwidth\hskip-\marginparsep
  \llap{\vrule height\textheight}\ignorespaces
  \hskip \marginparwidth\rlap{\vrule height\textheight}\hskip \marginparsep
  \llap{\vrule height\textheight}\hskip\textwidth\rlap{\vrule height\textheight}\hss}}%
\providecommand*\vb@xt@{\vbox to}%
\newcommand*{\Gm@pageframes}{%
  \vb@xt@\z@{\baselineskip\z@skip\lineskip\z@skip\lineskiplimit\z@%
   \ifGm@showcrop
    \vb@xt@\z@{\vskip-1\Gm@truedimen in\vskip\Gm@layoutvoffset%
     \hb@xt@\z@{\hskip-1\Gm@truedimen in\hskip\Gm@layouthoffset%
      \vb@xt@\Gm@layoutheight{%
       \let\protect\relax
       \hb@xt@\Gm@layoutwidth{\Gm@cropmark(1,0,0,-1)\hfil\Gm@cropmark(-1,0,0,-1)}%
       \vfil
       \hb@xt@\Gm@layoutwidth{\Gm@cropmark(1,0,0,1)\hfil\Gm@cropmark(-1,0,0,1)}}%
     \hss}%
    \vss}%
   \fi%
   \ifGm@showframe
    \if@twoside
     \ifodd\count\z@
       \let\@themargin\oddsidemargin
     \else
       \let\@themargin\evensidemargin
     \fi
    \fi
    \moveright\@themargin%
    \vb@xt@\z@{%
     \vskip\topmargin\vb@xt@\z@{\vss\hrule width\textwidth}%
     \vskip\headheight\vb@xt@\z@{\vss\hrule width\textwidth}%
     \vskip\headsep\vb@xt@\z@{\vss\hrule width\textwidth}
     \@tempdima\textwidth
     \advance\@tempdima by \marginparsep
     \advance\@tempdima by \marginparwidth
     \if@mparswitch
      \ifodd\count\z@
       \Gm@vrules@mpi
      \else
       \Gm@vrules@mpii
      \fi
     \else
      \Gm@vrules@mpi
     \fi
     \vb@xt@\z@{\vss\hrule width\textwidth}%
     \vskip\footskip\vb@xt@\z@{\vss\hrule width\textwidth}%
     \vss}%
    \fi%
  }}%
\let\Gm@shipout\shipout
\newcommand*{\gm@shipi}{%
  \ifvoid\@cclv\expandafter\aftergroup\fi\gm@shipii}%
\newcommand*\gm@shipii{%
  \ifvoid\@cclv
    \Gm@shipout\box\@cclv
  \else
    \ifGm@showframe
      \Gm@shipout\vbox{\Gm@pageframes\ifvbox\@cclv\unvbox\else\box\fi\@cclv}%
    \else\ifGm@showcrop
      \Gm@shipout\vbox{\Gm@pageframes\ifvbox\@cclv\unvbox\else\box\fi\@cclv}%
    \else
      \Gm@shipout\box\@cclv
    \fi\fi
  \fi}
%    \end{macrocode}
%
%    \begin{macro}{\ProcessOptionsKV}
%    This macro can process class and package options using `key=value'
%    scheme. Only class options are processed with an optional argument `|c|',
%    package options with `|p|' , and both of them by default.
%    \begin{macrocode}
\def\ProcessOptionsKV{\@ifnextchar[%]
  {\@ProcessOptionsKV}{\@ProcessOptionsKV[]}}%
\def\@ProcessOptionsKV[#1]#2{%
  \let\@tempa\@empty
  \@tempcnta\z@
  \if#1p\@tempcnta\@ne\else\if#1c\@tempcnta\tw@\fi\fi
  \ifodd\@tempcnta
   \edef\@tempa{\@ptionlist{\@currname.\@currext}}%
  \else
    \@for\CurrentOption:=\@classoptionslist\do{%
      \@ifundefined{KV@#2@\CurrentOption}%
      {}{\edef\@tempa{\@tempa,\CurrentOption,}}}%
    \ifnum\@tempcnta=\z@
      \edef\@tempa{\@tempa,\@ptionlist{\@currname.\@currext}}%
    \fi
  \fi
  \edef\@tempa{\noexpand\setkeys{#2}{\@tempa}}%
  \@tempa
  \AtEndOfPackage{\let\@unprocessedoptions\relax}}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macrocode}
\def\Gm@setkeys{\setkeys{Gm}}%
%    \end{macrocode}
%    \begin{macro}{\Gm@processconf}
%    \cs{ExecuteOptions} is replaced with \cs{Gm@setkey} to make it
%    possible to deal with '\meta{key}=\meta{value}' as its argument.
%    \begin{macrocode}
\def\Gm@processconfig{%
  \let\Gm@origExecuteOptions\ExecuteOptions
  \let\ExecuteOptions\Gm@setkeys
  \InputIfFileExists{geometry.cfg}{}{}
  \let\ExecuteOptions\Gm@origExecuteOptions}%
%    \end{macrocode}
%    \end{macro}
%
%  The original page layout before loading \Gm\ is saved with
%  |\Gm@save| and can be called by |\Gm@restore@org|. 
%  which will be used when |reset| or |pass| is specified.
%    \begin{macrocode}
\Gm@save
\edef\Gm@restore@org{\Gm@restore}%
\Gm@initall
%    \end{macrocode}
%    Processing config file.
%    \begin{macrocode}
\Gm@processconfig
%    \end{macrocode}
%    The optional arguments to \cs{documentclass} are processed here.
%    \begin{macrocode}
\ProcessOptionsKV[c]{Gm}%
%    \end{macrocode}
%    Paper dimensions given by class default are stored.
%    \begin{macrocode}
\Gm@setdefaultpaper
%    \end{macrocode}
%    The optional arguments to \cs{usepackage} are processed here.
%    \begin{macrocode}
\ProcessOptionsKV[p]{Gm}%
%    \end{macrocode}
%    Actual settings and calculation for layout dimensions are processed.
%    \begin{macrocode}
\Gm@process
%    \end{macrocode}
%
%    |verbose|, |showframe| and driver options are processed
%    at \cs{begin}|{document}|.
%    \begin{macrocode}
\AtBeginDocument{%
%    \end{macrocode}
%    Paper size is temporally adjusted according to \cs{mag} for
%    printing devices.
%    \begin{macrocode}
  \ifGm@resetpaper
    \edef\Gm@pw{\Gm@orgpw}%
    \edef\Gm@ph{\Gm@orgph}%
  \else
    \edef\Gm@pw{\the\paperwidth}%
    \edef\Gm@ph{\the\paperheight}%
  \fi
%    \end{macrocode}
%    If |pass| is set to |true|, no adjustment for page dimensions is done.
%    \begin{macrocode}
  \ifGm@pass\else
    \ifnum\mag=\@m\else
      \Gm@magtooffset
      \divide\paperwidth\@m
      \multiply\paperwidth\the\mag
      \divide\paperheight\@m
      \multiply\paperheight\the\mag
    \fi
  \fi
%    \end{macrocode}
%    Checking the driver options.
%    \begin{macrocode}
  \Gm@detectdriver
%    \end{macrocode}
%    |xetex|
%    \begin{macrocode}
  \ifx\Gm@driver\Gm@xetex
    \@ifundefined{pdfpagewidth}{}{%
      \setlength\pdfpagewidth{\Gm@pw}%
      \setlength\pdfpageheight{\Gm@ph}}%
    \ifnum\mag=\@m\else
      \ifx\Gm@truedimen\Gm@true
        \setlength\paperwidth{\Gm@pw}%
        \setlength\paperheight{\Gm@ph}%
      \fi
    \fi
  \fi
%    \end{macrocode}
%    If |pdftex| is set to |true|, pdf-commands are set properly.
%    To avoid |pdftex| magnification problem, \cs{pdfhorigin} and
%    \cs{pdfvorigin} are adjusted for \cs{mag}.
%    \begin{macrocode}
  \ifx\Gm@driver\Gm@pdftex
    \@ifundefined{pdfpagewidth}{}{%
      \setlength\pdfpagewidth{\Gm@pw}%
      \setlength\pdfpageheight{\Gm@ph}}%
    \ifnum\mag=\@m\else
      \@tempdima=\mag sp%
      \@ifundefined{pdfhorigin}{}{%
        \divide\pdfhorigin\@tempdima
        \multiply\pdfhorigin\@m
        \divide\pdfvorigin\@tempdima
        \multiply\pdfvorigin\@m}%
      \ifx\Gm@truedimen\Gm@true
        \setlength\paperwidth{\Gm@pw}%
        \setlength\paperheight{\Gm@ph}%
      \fi
    \fi
  \fi
%    \end{macrocode}
%    With V\TeX{} environment, V\TeX{} variables are set here.
%    \begin{macrocode}
  \ifx\Gm@driver\Gm@vtex
    \@ifundefined{mediawidth}{}{%
      \mediawidth=\paperwidth
      \mediaheight=\paperheight}%
    \ifvtexdvi
      \AtBeginDvi{\special{papersize=\the\paperwidth,\the\paperheight}}%
    \fi
  \fi
%    \end{macrocode}
%    If |dvips| or |dvipdfm| is specified, paper size is embedded in dvi
%    file with \cs{special}. For dvips, a landscape correction is added
%    because a landscape document converted by dvips is upside-down in
%    PostScript viewers.
%    \begin{macrocode}
  \ifx\Gm@driver\Gm@dvips
    \AtBeginDvi{\special{papersize=\the\paperwidth,\the\paperheight}}%
    \ifx\Gm@driver\Gm@dvips\ifGm@landscape
      \AtBeginDvi{\special{! /landplus90 true store}}%
    \fi\fi
%    \end{macrocode}
%    If |dvipdfm| is specified and \textsf{atbegshi} package in
%    `oberdiek' bundle is loaded, \cs{AtBeginShipoutFirst} is used
%    instead of \cs{AtBeginDvi} for compatibility with \textsf{hyperref}
%    and |dvipdfm| program.
%    \begin{macrocode}
  \else\ifx\Gm@driver\Gm@dvipdfm
    \ifcase\ifx\AtBeginShipoutFirst\relax\@ne\else
        \ifx\AtBeginShipoutFirst\@undefined\@ne\else\z@\fi\fi
      \AtBeginShipoutFirst{\special{papersize=\the\paperwidth,\the\paperheight}}%
    \or 
      \AtBeginDvi{\special{papersize=\the\paperwidth,\the\paperheight}}%
    \fi
  \fi\fi
%    \end{macrocode}
%    If |showframe=true|, page frames and lines are showed
%    on the first page.
%    \begin{macrocode}
  \ifGm@showframe
    \renewcommand*{\shipout}{\afterassignment\gm@shipi\setbox\@cclv=}
  \else\ifGm@showcrop
    \renewcommand*{\shipout}{\afterassignment\gm@shipi\setbox\@cclv=}
  \fi\fi
%    \end{macrocode}
%    Here the layout dimensions are saved. The layout can be restored
%    by \cs{restoregeometry} command.
%    \begin{macrocode}
  \Gm@save
  \edef\Gm@restore@pkg{\Gm@restore}%
%    \end{macrocode}
%    If |verbose=true| and |pass=false|, the system checks
%    if marginpars overrun the page.
%    \begin{macrocode}
  \ifGm@verbose\ifGm@pass\else\Gm@checkmp\fi\fi
%    \end{macrocode}
% |\Gm@showparams| puts the resulted parameters and dimensions
% into the log file. If |verbose| is true, they are displayed
% on the terminal as well.
%    \begin{macrocode}
  \Gm@showparams{in the preamble}%
  }% end of \AtBeginDocument
%    \end{macrocode}
%
%    \begin{macro}{\geometry}
%    The user-interface macro \cs{geometry} is defined here.
%    This command should be used in the preamble.
%    \begin{macrocode}
\newcommand{\geometry}[1]{%
  \Gm@clean
  \setkeys{Gm}{#1}%
  \Gm@process}%
\@onlypreamble\geometry
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\Gm@changelayout}
%    \begin{macrocode}
\DeclareRobustCommand\Gm@changelayout{%
  \setlength{\@colht}{\textheight}\setlength{\@colroom}{\textheight}%
  \setlength{\vsize}{\textheight}\setlength{\columnwidth}{\textwidth}%
  \if@twocolumn%
    \advance\columnwidth-\columnsep \divide\columnwidth\tw@%
    \@firstcolumntrue%
  \fi%
  \setlength{\hsize}{\columnwidth}%
  \setlength{\linewidth}{\hsize}}%
%    \end{macrocode}
%    \end{macro}
%
%    \begin{macro}{\newgeometry}
%    \begin{macrocode}
\newcommand\newgeometry[1]{%
  \clearpage
  \Gm@restore@org
  \Gm@initnewgm
  \Gm@newgmtrue
  \setkeys{Gm}{#1}%
  \Gm@newgmfalse
  \Gm@process
  \Gm@changelayout
  \Gm@showparams{by \string\newgeometry}}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\restoregeometry}
%    \begin{macrocode}
\newcommand\restoregeometry{%
  \clearpage
  \Gm@restore@pkg
  \Gm@changelayout}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\savegeometry}
%    \begin{macrocode}
\newcommand*\savegeometry[1]{%
  \Gm@save
  \expandafter\edef\csname Gm@restore@@#1\endcsname{\Gm@restore}}%
%    \end{macrocode}
%    \end{macro}
%    \begin{macro}{\loadgeometry}
%    \begin{macrocode}
\newcommand*\loadgeometry[1]{%
  \clearpage
  \@ifundefined{Gm@restore@@#1}{%
    \PackageError{geometry}{%
    \string\loadgeometry : name `#1' undefined}{%
    The name `#1' should be predefined with \string\savegeometry}%
  }{\@nameuse{Gm@restore@@#1}%
  \Gm@changelayout}}%
%</package>
%    \end{macrocode}
%    \end{macro}
%
% \section{Config file}
%    In the configuration file |geometry.cfg|, one can use
%    \cs{ExecuteOptions} to set the site or user default settings.
%    \begin{macrocode}
%<*config>
%<<SAVE_INTACT

%  Uncomment and edit the line below to set default options.
%\ExecuteOptions{a4paper}

%SAVE_INTACT
%</config>
%    \end{macrocode}
%
% \section{Sample file}
%    Here is an executable sample tex file.
%    \begin{macrocode}
%<*samples>
%<<SAVE_INTACT
\documentclass{article}% uses letterpaper by default
% \documentclass[a4paper]{article}% for A4 paper
%---------------------------------------------------------------
% Edit and uncomment one of the settings below
%---------------------------------------------------------------
% \usepackage{geometry}
% \usepackage[centering]{geometry}
% \usepackage[width=10cm,vscale=.7]{geometry}
% \usepackage[margin=1cm, papersize={12cm,19cm}, resetpaper]{geometry}
% \usepackage[margin=1cm,includeheadfoot]{geometry}
\usepackage[margin=1cm,includeheadfoot,includemp]{geometry}
% \usepackage[margin=1cm,bindingoffset=1cm,twoside]{geometry}
% \usepackage[hmarginratio=2:1, vmargin=2cm]{geometry}
% \usepackage[hscale=0.5,twoside]{geometry}
% \usepackage[hscale=0.5,asymmetric]{geometry}
% \usepackage[hscale=0.5,heightrounded]{geometry}
% \usepackage[left=1cm,right=4cm,top=2cm,includefoot]{geometry}
% \usepackage[lines=20,left=2cm,right=6cm,top=2cm,twoside]{geometry}
% \usepackage[width=15cm, marginparwidth=3cm, includemp]{geometry}
% \usepackage[hdivide={1cm,,2cm}, vdivide={3cm,8in,}, nohead]{geometry}
% \usepackage[headsep=20pt, head=40pt,foot=20pt,includeheadfoot]{geometry}
% \usepackage[text={6in,8in}, top=2cm, left=2cm]{geometry}
% \usepackage[centering,includemp,twoside,landscape]{geometry}
% \usepackage[mag=1414,margin=2cm]{geometry}
% \usepackage[mag=1414,margin=2truecm,truedimen]{geometry}
% \usepackage[a5paper, landscape, twocolumn, twoside,
%    left=2cm, hmarginratio=2:1, includemp, marginparwidth=43pt,
%    bottom=1cm, foot=.7cm, includefoot, textheight=11cm, heightrounded,
%    columnsep=1cm,verbose]{geometry}
%---------------------------------------------------------------
% No need to change below
%---------------------------------------------------------------
\geometry{verbose,showframe}% options appended.
\newcommand\mynote{\marginpar%
[\raggedright\rule{\marginparwidth}{.7pt}\\A left side note.]%
{\raggedright\rule{\marginparwidth}{.7pt}\\A side note.}}%
\def\fox{A quick brown fox jumps over the lazy dog. }
\def\fivefoxes{\fox\fox\fox\fox\fox}
\def\manyfoxes{\fivefoxes\mynote\fivefoxes\par\fivefoxes\fivefoxes\par}
% \let\mynote\relax % removes marginal notes.
\begin{document}
\manyfoxes\manyfoxes\manyfoxes\manyfoxes
\manyfoxes\manyfoxes\manyfoxes\manyfoxes
\manyfoxes\manyfoxes\manyfoxes\manyfoxes
\end{document}
%SAVE_INTACT
%</samples>
%    \end{macrocode}
%
% \Finale
%
\endinput