elpres (24jan18)

git-svn-id: svn://tug.org/texlive/trunk@46429 c570f23f-e606-0410-a88d-b1316a301751

7 files changed, 344 insertions, 135 deletions

diff --git a/Master/texmf-dist/doc/latex/elpres/README b/Master/texmf-dist/doc/latex/elpres/README
new file mode 100644
index 00000000000..2997fbd3725
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/elpres/README
@@ -0,0 +1,20 @@
+Document class: elpres
+
+Version: 0.4a
+
+License: LaTeX project public license (lppl)
+
+Short description:
+
+Elpres is a simple class for electronic presentations to be shown on a screen
+or a beamer. Elpres is derived from article.cls and may be used with LaTeX or
+pdfLaTeX.
+
+The elpres class requires the packages: ifthen, fancyhdr, geometry. 
+
+For enhanced options, the packages ragged2e, overlays, wallpaper, eso-pic,
+footmisc and hyperref are useful.
+
+Volker Kiefel
+volker (dot) kiefel (at) freenet (dot) de
+
diff --git a/Master/texmf-dist/doc/latex/elpres/elpres-example.tex b/Master/texmf-dist/doc/latex/elpres/elpres-example.tex
index 992d8f4e739..d081d125cad 100644
--- a/Master/texmf-dist/doc/latex/elpres/elpres-example.tex
+++ b/Master/texmf-dist/doc/latex/elpres/elpres-example.tex
@@ -1,56 +1,56 @@
-\documentclass[pdftex,12pt,helvetfont]{elpres}
+\documentclass[11pt,pdftex,helvetfont,4x3]{elpres}
 \usepackage[latin1]{inputenc}
 \usepackage{color}
-\usepackage{graphicx}
-
-\definecolor{rot}{rgb}{0.75,0.05,0.25}
-\definecolor{hellgrau}{gray}{0.5}
-\definecolor{blau}{rgb}{0,0,0.7}
-
-\newcommand{\hoch}[1]{\raisebox{0.6ex}{#1}}
-\newcommand{\tief}[1]{\raisebox{-0.6ex}{#1}}
-
-
+\usepackage[perpage,para,symbol]{footmisc}
 \usepackage[document]{ragged2e}
 \RaggedRight
 
 \begin{document}
 \begin{titlepage}
-\distance{1}
-\centering \LARGE
- \bfseries \textcolor{blau}{Title of a presentation written with the 
-    \texttt{elpres} class}
-
-\distance{1}
-\large
-Autor\\[1ex]\textcolor{hellgrau}{Institution}
-\distance{2}
+  \centering
+  \distance{1}
+  {
+    \Huge \bfseries \textcolor{blue}{Title of the presentation} \par
+  }
+  \vspace{1.3ex} \large
+  Author\\[2ex]Date and place of presentation
+  \distance{2}
 \end{titlepage}
 
-\begin{psli}[Title of a page using the \texttt{psli} environment]
-\textcolor{rot}{The first page}
+\begin{psli}[Title of first page]
+The first page
 
-\begin{citemize}
-  \item One
-  \item Two
-\end{citemize}
+\begin{itemize}
+   \item first line in an itemized list
+   \item second line in an itemized list
+\end{itemize}
+\end{psli}
 
-\begin{cenumerate}
-  \item the first enumerated item
-  \item the second enumerated item
-\end{cenumerate}
+\begin{psli}[Title of second page\footnote{footnotes are often not a good
+    idea for a presentation}]
+    
+The second page with a nested, ``vertically compressed'' list
 
-\begin{cdescription}
-  \item [One] described item
-  \item [Another] described item
-\end{cdescription}
+\begin{citemize}
+   \item first line in an itemized list
+   \item second line in an itemized list
+   \begin{cenumerate}
+      \item first line of numbered list 
+      \item second line of numbered list
+   \end{cenumerate}
+   \item final line in itemized list\footnote{\dots\ so there should be
+     good reasons to insert a second comment on the same page}
+\end{citemize}
 
+{\small For footnotes, the \texttt{footmisc} package, at least with the
+  options \texttt{perpage} and \texttt{symbol} is recommended. \par}
 \end{psli}
 
+
 \begin{rsli}
-The second page written with the \texttt{rsli}-environment
+A final page for freely arranged text and
+graphics\footnote{References to scientific publications may be added
+  as footnotes} 
 \end{rsli}
-
 \end{document}
 
-
diff --git a/Master/texmf-dist/doc/latex/elpres/elpres-manual.pdf b/Master/texmf-dist/doc/latex/elpres/elpres-manual.pdf
index ad170d920e5..045f8dd0c4f 100644
--- a/Master/texmf-dist/doc/latex/elpres/elpres-manual.pdf
+++ b/Master/texmf-dist/doc/latex/elpres/elpres-manual.pdf
diff --git a/Master/texmf-dist/doc/latex/elpres/elpres-manual.tex b/Master/texmf-dist/doc/latex/elpres/elpres-manual.tex
index 112ccc7ca73..3cbbd024ee1 100644
--- a/Master/texmf-dist/doc/latex/elpres/elpres-manual.tex
+++ b/Master/texmf-dist/doc/latex/elpres/elpres-manual.tex
@@ -2,24 +2,22 @@
 
 \setlength{\parskip}{0.6ex}
 \setlength{\parindent}{0mm}
-\usepackage{mathptmx,courier}
-\usepackage[scaled=0.92]{helvet}
-%\usepackage{german}
 \usepackage[latin1]{inputenc}
 \usepackage{textcomp}
-%% \usepackage[a4paper,hmargin=2.4cm]{geometry}
 \usepackage[a4paper,hmargin=2.4cm,bottom=3.2cm]{geometry}
 \newcommand{\hoch}[1]{\raisebox{0.6ex}{#1}}
 \newcommand{\tief}[1]{\raisebox{-0.6ex}{#1}}
 \usepackage{url}
 
-\title{\textsf{Elpres}: electronic presentations with (PDF)\LaTeX}
-\author{Volker Kiefel\thanks{volker dot kiefel at freenet dot de}}
-\date{v0.3}
+\title{\textsf{elpres} --- electronic presentations \\ with (PDF)\LaTeX}
+\author{Volker Kiefel\thanks{volker dot kiefel at freenet dot de, 
+       http://vkiefel.de/elpres.html}}
+\date{v0.4a\\[1.8ex]
+      January 24, 2018}
 \begin{document}
 \maketitle
 \thispagestyle{empty}
-
+ 
 {
 \setlength{\parskip}{0ex}
 \tableofcontents
@@ -27,64 +25,73 @@
 
 \section{Introduction}
 
-\textsf{Elpres} is a simple class for presentations to be shown on
-screen or beamer. It is derived from \LaTeX's \texttt{article} class.
-\textsf{Elpres} is primarily intended to be used with PDF\LaTeX{} or with \LaTeX,
-\texttt{dvips} and Ghostview/Ghostscript. The ``virtual paper
-size'' of documents produced by this class: width=128mm, height=96mm.
-\textsf{Elpres} requires that the \texttt{fancyhdr} and \texttt{geometry}
-packages are available on the system. Enhancements to the elpres class are
-easily made available by other packages, these include hypertext elements
-(\texttt{hyperref} package) and slides with a background from a bitmap
-(\texttt{wallpaper}, \texttt{eso-pic} packages).
-
+\textsf{Elpres} is a simple class for presentations to be shown on screen or
+beamer. It is derived from \LaTeX's \texttt{article} class.  \textsf{Elpres}
+is primarily intended to be used with PDF\LaTeX{} or with \LaTeX,
+\texttt{dvips} and Ghostview/Ghostscript. The default ``virtual paper size''
+of documents produced by this class: width=128mm, height=96mm corresponds to a
+4:3 aspect ratio. Other aspect ratios for widescreen monitors may be selected
+by class options. \textsf{Elpres} requires that the \texttt{ifthen},
+\texttt{fancyhdr} and \texttt{geometry} packages are available on the system.
+Enhancements to \texttt{elpres} are easily made available by other packages,
+these include overlay support for incremental slides (package
+\texttt{overlays}) hypertext elements (\texttt{hyperref} package) and slides
+with a background from a bitmap (\texttt{wallpaper}, \texttt{eso-pic}
+packages). 
 
 \section{Installation}
 
 Copy \texttt{elpres.cls} into  a directory, where your \LaTeX-system can find
-it.
+it and update the files database\footnote{e.\,g.  by using the
+\texttt{mktexlsr} or \texttt{texhash} command (TeXlive)}.
 
 \section{Usage}
 
+\label{secUsage}
+
 The class is used with 
 \begin{verbatim}
    \documentclass[options]{elpres}
 \end{verbatim}
 
-\textbf{Options of the \texttt{article} class} are also available to elpres,
-e.\,g.  \texttt{10pt}, \texttt{11pt}, \texttt{12pt} for selection of font
-size.  \textbf{Elpres-specific options} allow selection of the font:
-\texttt{tmrfont} (Times Roman), \texttt{helvetfont} (Helevetica),
-\texttt{cmfont} (Computer Modern), \texttt{sansfont} (Sans Serif: default).
-However, not all options of the \texttt{article} class will be appropriate for
-a presentation class, e.\,g.  \texttt{twocolumn}.
+\textbf{Options of the \texttt{article} class} are also available to
+\texttt{elpres}, e.\,g.  \texttt{10pt}, \texttt{11pt}, \texttt{12pt} for
+selection of font size.  \textbf{\texttt{Elpres}-specific options} allow
+selection of the font: \texttt{tmrfont} (Times Roman), \texttt{helvetfont}
+(Helevetica), \texttt{cmfont} (Computer Modern), \texttt{sansfont} (Sans
+Serif: default).  Options for different screen aspect ratios: \texttt{4x3}
+(default), \texttt{16x9}, \texttt{16x10}. 
 
 A simple example document:
 
-
 \begin{verbatim}
-   \documentclass[12pt,pdftex,helvetfont]{elpres}
+   \documentclass[12pt,pdftex,helvetfont,4x3]{elpres}
    \usepackage[latin1]{inputenc}
    \usepackage{color}
    \usepackage[document]{ragged2e}
    \RaggedRight
-
+   
    \begin{document}
    \begin{titlepage}
      \centering
      \distance{1}
      {
-     \Huge \bfseries \textcolor{blue}{Title of the presentation} \par
+       \Huge \bfseries \textcolor{blue}{Title of the presentation} \par
      }
      \vspace{1.3ex} \large
      Author\\[2ex]Institution
      \distance{2}
    \end{titlepage}
-
+   
    \begin{psli}[Title of Page]
    The first page
+   
+   \begin{itemize}
+      \item first line in an itemized list
+      \item second line in an itemized list
+   \end{itemize}
    \end{psli}
-
+   
    \begin{rsli}
    The second page
    \end{rsli}
@@ -112,7 +119,28 @@ slides constructed with the \texttt{rsli} and \texttt{titlepage} environments.
 You should use pairs of \verb+\distance{}+ commands with numbers indicating
 the relative height of empty space, see the titlepage in the example above.
 
-The package provides a ``vertically compressed'' \texttt{itemize}-environment:
+The use of footnotes on slides is often problematic, if they cannot be
+avoided, the \texttt{footmisc} package is recommended: the \texttt{perpage}
+option resets numbering for each new slide. For a presentation, the
+\texttt{symbol} option allows to use symbols instead of numbers. 
+After inserting a new footnote, numbers or symbols are correctly
+inserted only after a second run of \LaTeX.
+
+\subsection{Improving paragraph justification}
+
+By default, \LaTeX\ produces justified paragraphs with lines of equal length,
+this may often not be appropriate for the usually very short lines of text
+in presentations. The \LaTeX\ \verb+\raggedright+ command has its own
+deficiencies: by inhibiting hypenation, the text at the right margin will
+often look too
+ragged. A solution is to use the \verb+\RaggedRight+ command of the
+\texttt{ragged2e} package by Martin Schröder. 
+
+
+\subsection{Generate vertically compressed lists}
+
+The \texttt{elpres} package provides a ``vertically compressed''
+\texttt{itemize}-environment:
 
 \begin{verbatim}
    \begin{citemize}
@@ -124,10 +152,38 @@ The package provides a ``vertically compressed'' \texttt{itemize}-environment:
 Similarly, a \texttt{cenumerate} and a \texttt{cdescription} environment may
 be used.
 
-Pictures can be included with the \texttt{includegraphics}-command of the
-\texttt{graphicx}-package. Please be aware that the dimensions of the pages
-are 128mm \texttimes{} 96mm and therefore included graphics are scaled
-appropriately.
+% neu Dezember 2017
+Another solution for the customization of \texttt{itemize}
+environments is given by the \texttt{enumitem} package. Therefore
+
+\begin{verbatim}
+   \usepackage{enumitem}
+\end{verbatim}
+
+should be added to the preamble, and  a comma-sperated list of parameters
+parameters can be added in the format:
+
+\begin{verbatim}
+   \begin{itemize}[parameter-list] 
+      ... 
+   \end{itemize} 
+\end{verbatim}
+
+The ``vertically
+compressed'' list can then be obtained with
+
+\begin{verbatim}
+   \begin{itemize}[nosep]
+     \item  one
+     \item  two
+   \end{itemize}
+\end{verbatim}
+
+The \texttt{enumitem} package is also able to modify the \texttt{enumerate} and
+description \texttt{environments}.
+
+
+
 
 \section{Enhancements to elpres}
 
@@ -135,21 +191,38 @@ appropriately.
 
 \subsection{Include graphics files}
 
-\label{secInclGraphicsFiles}
+Graphics files/pictures can be included with the
+\texttt{includegraphics}-command of the \texttt{graphicx}-package. Please be
+aware that the dimensions of the pages are 128mm \texttimes{} 96mm and
+therefore included graphics are scaled appropriately. A safe way to generate a
+page with a picture could be (with \texttt{pict.png} as the name of the
+graphics file): 
+
+\label{secUsageGraph}
 
-Graphics files may be included with the \texttt{includegraphics} command of
-the \texttt{graphicx} package. If you create pdf-files with \texttt{pdflatex},
-both .pdf and .png files can be included, if you create pdf files with
-\LaTeX{} and \texttt{dvipdfm} or if you create ps files with \LaTeX{} and
-\texttt{dvips} you may include .eps files:
 
 \begin{verbatim}
-   \usepackage{graphicx} % (in preamble) 
+   \usepackage[pdftex]{graphicx} % (in preamble) 
    ...
-   \includegraphics[width=0.9\textwidth]{graphics-file.png} 
-                                                            
+   \begin{rsli}
+     \centering
+     \distance{1}
+     \includegraphics[width=0.9\textwidth,%
+                      height=0.9\textheight,%
+                      keepaspectratio=true]{pict.png}
+     \distance{1}
+   \end{rsli}
 \end{verbatim}
 
+
+The \verb+\includegraphics[]{}+ comannd requires to select the correct device
+driver related option (e.\,g. \texttt{pdftex} or \texttt{dvips})
+(documentclass).
+
+
+\label{secInclGraphicsFiles}
+
+
 \subsection{Arrange text and pictures in two (or more) columns}
 
 \label{secTwoColumns}
@@ -175,36 +248,107 @@ Text and graphics may be arranged in two or more columns with
 Details on the minipage environment may be found in the \LaTeX{}
 documentation.
 
-\subsection{Create a ``handout'' from a presentation}
 
-\label{secHandout}
+\subsection{Incremental slides (overlays)}
+
+\label{secOverlay}
+
+If the contents of slides are to be made visible step
+by step this can be achieved by a series of output PDF or (PS) files (carrying
+the same page number) usually called \emph{overlays}. It may also be of
+interest to change a highlighting color in a series of overlays. This is most
+easily done by using the \texttt{overlays} package written by Andreas Nolda 
+together with \texttt{elpres}. 
 
-If you wish to create a handout from your presentation, you should create a
-PostScipt version of your presentation and convert ot with the
-\texttt{psnup}-tool. This is possible, if you create your presentation as
-\texttt{.ps} file from a \texttt{.dvi}-file with \texttt{dvips}. If your
-primary version is a pdf-file, e.\,g. created by pdf\LaTeX, either
+To generate a series of four overlays sequentially showing four lines of a
+list:
 
 \begin{enumerate}
-  \item convert the pdf-file with the command \texttt{pdf2ps} (part of the
-  ghostscript package)
-  \item or convert it with Acrobat.
+  \item load the \texttt{overlays} package in the preamble
+  \item put a \texttt{psli} or \texttt{rsli} slide environment into an
+  \texttt{overlays} (or \texttt{fragileoverlays}) environment 
+  \item enter the number of overlays as the first parameter to the 
+  \texttt{overlays} environment  
+  \item enter text contents with the \texttt{visible} command with the range
+    of overlays showing this text content
 \end{enumerate}
 
+A simple example:
+
+\begin{verbatim}
+   % to be added in preamble
+   \usepackage{overlays}
+   ...
+   \begin{overlays}{4}
+   \begin{psli}[Title of slide]
+   \begin{itemize}
+     \visible{1-4}{\item first item of list} 
+     \visible{2-4}{\item second list item}
+     \visible{3-4}{\item 3rd list item}
+     \visible{4}{\item final list item}
+   \end{itemize}
+   \end{psli}
+   \end{overlays}
+   ... 
+\end{verbatim}
+
+The following example uses the \texttt{alert} command to highlight lines
+sequentially:
 
-The following command creates a handout with four slides on one page with the
-\texttt{psnup}-command line program%
-\footnote{A win32-version of this tool can be obtained from the website
-\url{http://people.freenet.de/vkiefel/compiled-SW.html}. \texttt{Psnup} may
-be bundled to your \TeX/\LaTeX{} distribution}.
+\begin{verbatim}
+   \begin{overlays}{4}
+   \begin{psli}[Title of slide]
+   \begin{itemize}
+     \alert{1}{\item first item of list} 
+     \alert{2}{\item second list item}
+     \alert{3}{\item 3rd list item}
+     \alert{4}{\item final list item}
+   \end{itemize}
+   \end{psli}
+   \end{overlays}
+\end{verbatim}
+
+The ``hidden'' text contents are written by \texttt{overlays} in the same
+color as the background, default is white. If you use a different background
+color, you have to change the color of the hidden text as well by assigning the
+background color to the color name \texttt{background} (understood by the
+\texttt{overlays} package).  In the following example you define a light
+yellow as background:
 
 \begin{verbatim}
-   psnup -4 -H96mm -W128mm -m15mm -b6mm old.ps new.ps
+   % (in the preamble)
+   \definecolor{myyellow}{rgb}{0.96,0.98,0.72} % define color
+   \definecolor{background}{named}{myyellow}   % color assigned to 
+                                               % hidden text
+   \pagecolor{myyellow}                        % color of slide background
 \end{verbatim}
 
-Details of the command line options can
-be found in the short documentation of \texttt{psnup}. You may print
-\texttt{new.ps} with \texttt{ghostview} or \texttt{gsview32/ghostview}.
+
+For more details on \texttt{overlays}, see the documentation of the package.
+
+\subsection{Create a ``handout'' from a presentation}
+
+\label{secHandout}
+
+If you wish to generate a handout from your presentation with more than one
+pages on a printed page, you may process a PDF presentation file with
+\texttt{pdfjam}\footnote{which regerettably is only available on
+Linux or other Unix-like systems}.  
+
+The following command:
+
+\begin{verbatim}
+   pdfjam --nup 2x3 --scale 0.9 -o new.pdf  presentation.pdf '1-4,7-17,22'
+\end{verbatim}
+
+\begin{sloppypar}
+creates a ``handout'' PDF document (\texttt{new.pdf}) with the slides 1-4,7-17
+and 22 of \texttt{presentation.pdf} arranged in  two columns and three rows.
+With the additional option \texttt{--frame~true}, \texttt{pdfjam} draws a box
+around each slide. More details can be found in the \texttt{pdfjam}
+man page. On Windows systems Acrobat reader may be helpful to print
+handout documents with more than one slide per printed page.
+\end{sloppypar}
 
 \subsection{Create presentations with hypertext elements}
 
@@ -235,8 +379,8 @@ the warning you can use the \texttt{rsli}-environment for the titlepage and use
 
 \subsubsection{\texttt{Wallpaper} package}
 
-To create a background with color gradient, with pictures or with a ``tiled''
-background using bitmaps you may use the \texttt{wallpaper}
+To create a slide background with a graphical wallpaper 
+background using bitmap files you may use the \texttt{wallpaper}
 package\footnote{written by Michael H.F. Wilkinson and available on CTAN}. 
 Load the \texttt{wallpaper} package with
 
@@ -245,24 +389,23 @@ Load the \texttt{wallpaper} package with
 \end{verbatim}
 
 \begin{sloppypar}
-in the preamble. In order to generate a background gradient on the basis of the bitmap
-file \texttt{gradient2.png}\footnote{included in this 
-\texttt{elpres}-distribution} enter 
+in the preamble. In order to generate a background based on bitmap
+file \texttt{background.png}, enter 
 \end{sloppypar}
 
 \begin{verbatim}
-   \CenterWallPaper{1}{gradient2}
+   \CenterWallPaper{1}{background.png}
 \end{verbatim}
 
 before the contents of the presentation\footnote{i.\,e. following
 \texttt{\textbackslash begin\{document\}}}. 
-This works best with bitmaps with a width:size ratio of 4:3, the included
-bitmap files have a size of 640:480 pixel.
-Similarly bitmap files may be
+This works best with bitmaps with an appropriate aspect ratio, in the case of
+an 4x3 screen format a bitmap picture of 640x480 pixel would fit perfectly. 
+Moreover bitmap files may be
 used as tiles as described in the \texttt{wallpaper} documentation like
 
 \begin{verbatim}
-   \TileSquareWallPaper{4}{TGTamber}
+   \TileSquareWallPaper{4}{background.png}
 \end{verbatim}
 
 More details on this topic may be found in the \texttt{wallpaper}
@@ -280,7 +423,7 @@ Another package which allows you to paint the background with a picture is
    ...
 
    \AddToShipoutPicture{
-   \includegraphics[height=\paperheight]{gradient2.png}
+   \includegraphics[height=\paperheight]{background.png}
    }
 \end{verbatim}
 
@@ -319,4 +462,14 @@ added).
 \texttt{cmfont} (Computer Modern), \texttt{sansfont} (Sans Serif: default).
 Documentation updated, sections \ref{secInclGraphicsFiles} and
 \ref{secTwoColumns} added.
+\textbf{v0.4} (20.01.2018): New class options for different screen aspect
+ratios \texttt{4x3}, \texttt{16x9}, \texttt{16x10}; ``compressed'' list
+environments modified; documentation completed:
+packages for use with \texttt{elpres}: \texttt{enumitem} (alternative list
+environments), \texttt{overlays} (overlay support: incremental slides);
+section \ref{secHandout} was completely rewritten.
+\textbf{v0.4a} (24.01.2018): Documentation completed
 \end{document}
+
+
+%  vim:set spell:set fileencoding=latin1:
diff --git a/Master/texmf-dist/doc/latex/elpres/gradient1.png b/Master/texmf-dist/doc/latex/elpres/gradient1.png
deleted file mode 100644
index 02cff8d380a..00000000000
--- a/Master/texmf-dist/doc/latex/elpres/gradient1.png
+++ /dev/null
diff --git a/Master/texmf-dist/doc/latex/elpres/gradient2.png b/Master/texmf-dist/doc/latex/elpres/gradient2.png
deleted file mode 100644
index e6db39cf0c1..00000000000
--- a/Master/texmf-dist/doc/latex/elpres/gradient2.png
+++ /dev/null
diff --git a/Master/texmf-dist/tex/latex/elpres/elpres.cls b/Master/texmf-dist/tex/latex/elpres/elpres.cls
index c366647b292..11ccb14b622 100644
--- a/Master/texmf-dist/tex/latex/elpres/elpres.cls
+++ b/Master/texmf-dist/tex/latex/elpres/elpres.cls
@@ -1,14 +1,22 @@
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesClass{elpres}[2005/08/12 class for plain electronic presentations]
+\ProvidesClass{elpres}[2018/01/24 class for plain electronic presentations]
 %
-% 2004/06/19 v0.1 initial version
+% 2004/06/19 v0.1  - initial version
 %
-% 2004/08/29 v0.2 - Page number: now `footnotesize' instead of `normalsize',
-%                 - Left and right margins changed
-%                 - `cenumerate' and `cdescription' environments
-%                   added
-% 2005/08/12 v0.3 - Options for selection of fonts added
+% 2004/08/29 v0.2  - Page number: now `footnotesize' instead of `normalsize',
+%                  - Left and right margins changed
+%                  - `cenumerate' and `cdescription' environments
+%                    added
 %
+% 2005/08/12 v0.3  - Options for selection of fonts added
+%
+% 2018/01/20 v0.4  - Lists environments `citemize', `cenumerate', 
+%                    `cdescription modified
+%                  - aspect ratio may be selected: 4x3 (default) 16x9, 
+%                    16x10: i.e. support for widescreen monitors added 
+%                  - documentation updated 
+%
+% 2018/01/24 v0.4a - documentation completed
 %
 
 % Options: select fonts
@@ -30,15 +38,41 @@
   \renewcommand{\fontna}{sansfo}
 }
 
+% Options: screen formats
+\newcommand{\screenformat}{scr4x3}
+
+\DeclareOption{4x3}{%
+  \renewcommand{\screenformat}{scr4x3}%
+}
+
+\DeclareOption{16x9}{%
+  \renewcommand{\screenformat}{scr16x9}%
+}
+
+\DeclareOption{16x10}{%
+  \renewcommand{\screenformat}{scr16x10}%
+}
+
+
 \DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
 \ProcessOptions\relax
 \LoadClass{article}
-% \LoadClassWithOptions{article}
 
-%% \RequirePackage[foot=10.2pt,head=15pt,paperwidth=128mm,paperheight=96mm,left=5mm,top=5mm,right=5mm,bottom=8mm]{geometry}
-\RequirePackage[foot=10.2pt,head=0pt,paperwidth=128mm,paperheight=96mm,left=5mm,top=5mm,right=7mm,bottom=8mm]{geometry}
+
 \RequirePackage{ifthen}
 
+\ifthenelse{\equal{\screenformat}{scr4x3}}{%
+\RequirePackage[foot=10.2pt,head=0pt,paperwidth=128mm,paperheight=96mm,left=5mm,top=5mm,right=7mm,bottom=8mm]{geometry}%
+}{}
+
+\ifthenelse{\equal{\screenformat}{scr16x9}}{%
+\RequirePackage[foot=10.2pt,head=0pt,paperwidth=176mm,paperheight=99mm,left=5mm,top=5mm,right=7mm,bottom=8mm]{geometry}%
+}{}
+
+\ifthenelse{\equal{\screenformat}{scr16x10}}{%
+\RequirePackage[foot=10.2pt,head=0pt,paperwidth=160mm,paperheight=100mm,left=5mm,top=5mm,right=7mm,bottom=8mm]{geometry}%
+}{}
+
 \RequirePackage{fancyhdr}
 \renewcommand{\headrulewidth}{0mm}
 %% \pagestyle{fancy}
@@ -64,9 +98,9 @@
 \setlength{\parskip}{0.6ex}
 \setlength{\parindent}{0mm}
 
+%% plain slide -- heading line
 \newenvironment{psli}[1][]%
    {{\raggedright \large\bfseries #1\par}\par\vspace*{\stretch{1}}}%
-%   {{\centering \large\bfseries #1\par}\par\vspace*{\stretch{1}}}%
    {\par\vspace*{\stretch{1}}\newpage}
 
 %% raw slide -- no heading
@@ -74,37 +108,39 @@
 
 %% compressed itemize
 \newenvironment{citemize}%
-  {\begin{itemize}%
+  { \vspace{-0.7ex}%
+    \begin{itemize}%
     \setlength{\itemsep}{0ex}%
     \setlength{\parskip}{0.1ex}%
     \setlength{\parsep}{0ex}%
     }%
-  {\end{itemize}}%
+  {\end{itemize}%
+   \vspace{-0.7ex}}%
 
 %% compressed enumerate
 \newenvironment{cenumerate}%
-  {\begin{enumerate}%
+  { \vspace{-0.7ex}%
+    \begin{enumerate}%
     \setlength{\itemsep}{0ex}%
     \setlength{\parskip}{0.1ex}%
     \setlength{\parsep}{0ex}%
     }%
-  {\end{enumerate}}%
+  {\end{enumerate}%
+   \vspace{-0.7ex}}%
 
 %% compressed description
 \newenvironment{cdescription}%
-  {\begin{description}%
+  { \vspace{-0.7ex}
+    \begin{description}%
     \setlength{\itemsep}{0ex}%
     \setlength{\parskip}{0.1ex}%
     \setlength{\parsep}{0ex}%
     }%
-  {\end{description}}%
-
-
-
+  {\end{description}%
+   \vspace{-0.7ex}}%
 
 \ifthenelse{\equal{\fontna}{tmrfo}}{\RequirePackage{mathptmx}\RequirePackage{courier}}{}
 \ifthenelse{\equal{\fontna}{helvetfo}}{\RequirePackage[scaled=0.92]{helvet}\RequirePackage{courier}}{}
 \ifthenelse{\equal{\fontna}{initialisiert}}{\renewcommand{\familydefault}{\sfdefault}}{}
 
-
 % vim: syntax=tex tw=2048 ai