elpres (14jul20)

git-svn-id: svn://tug.org/texlive/trunk@55834 c570f23f-e606-0410-a88d-b1316a301751

7 files changed, 397 insertions, 107 deletions

diff --git a/Master/texmf-dist/doc/latex/elpres/README b/Master/texmf-dist/doc/latex/elpres/README
deleted file mode 100644
index 2997fbd3725..00000000000
--- a/Master/texmf-dist/doc/latex/elpres/README
+++ /dev/null
@@ -1,20 +0,0 @@
-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/README.md b/Master/texmf-dist/doc/latex/elpres/README.md
new file mode 100644
index 00000000000..a2730e2d3b7
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/elpres/README.md
@@ -0,0 +1,39 @@
+Elpres v0.5 2020-07-12
+
+Short description
+=================
+
+The elpres class is intended to be used for presentations on a screen or
+with a beamer/projector.  It is derived from LaTeX’s article class and can
+be used with with LaTeX, pdfLaTeX (and LuaLaTeX).  The default "virtual
+paper size" of presentations generated by this class corresponds to a 4:3
+(width:height) aspect ratio. Other aspect ratios for widescreen monitors
+(16:9, 16x:0) may be selected.
+
+The elpres class requires: ifthen, fancyhdr, hyperref, graphicx, xcolor and
+geometry.
+
+For enhanced features the packages ragged2e, overlays, wallpaper, eso-pic
+and footmisc are useful.
+
+A homepage for the elpres project: http://vkiefel.de/elpres.html with
+additional material.
+
+Changes in v0.5
+===============
+
+New class options: *nofonts* (no font selection) and *navisymb* (inserts a
+panel of symbols for navigation). New commands: *auvimm* (generates a link
+to external audio, video files), *fromlinktext* and *totargettext* (create
+links within a presentation).
+
+License
+=======
+
+This work may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL). The latest version of this license is
+available in the file:
+
+   http://www.latex-project.org/lppl.txt
+
+Current maintainer is Volker Kiefel.
diff --git a/Master/texmf-dist/doc/latex/elpres/elpres-example.pdf b/Master/texmf-dist/doc/latex/elpres/elpres-example.pdf
new file mode 100644
index 00000000000..1c28afdc8ce
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/elpres/elpres-example.pdf
diff --git a/Master/texmf-dist/doc/latex/elpres/elpres-example.tex b/Master/texmf-dist/doc/latex/elpres/elpres-example.tex
index d081d125cad..bb25d110bbc 100644
--- a/Master/texmf-dist/doc/latex/elpres/elpres-example.tex
+++ b/Master/texmf-dist/doc/latex/elpres/elpres-example.tex
@@ -1,56 +1,100 @@
-\documentclass[11pt,pdftex,helvetfont,4x3]{elpres}
+\documentclass[12pt,pdftex,helvetfont,4x3]{elpres}
 \usepackage[latin1]{inputenc}
-\usepackage{color}
-\usepackage[perpage,para,symbol]{footmisc}
+\usepackage[perpage,para,symbol,norule]{footmisc}
 \usepackage[document]{ragged2e}
-\RaggedRight
+
+\definecolor{darkteal}{rgb}{0,0.34,0.34}
+\definecolor{darkred}{rgb}{0.7,0.1,0.1}
+
+\newcommand{\ticolor}[1]{\textcolor{darkteal}{#1}}
 
 \begin{document}
 \begin{titlepage}
   \centering
   \distance{1}
   {
-    \Huge \bfseries \textcolor{blue}{Title of the presentation} \par
+    \Huge \bfseries \textcolor{darkred}{Title of presentation} \par
   }
   \vspace{1.3ex} \large
   Author\\[2ex]Date and place of presentation
   \distance{2}
 \end{titlepage}
 
-\begin{psli}[Title of first page]
-The first page
+\begin{psli}[\ticolor{Title of first page}]
+This is an example of a \LaTeX\ \texttt{itemize} list 
 
 \begin{itemize}
    \item first line in an itemized list
    \item second line in an itemized list
+   \item third line in an itemized list
 \end{itemize}
+
+
 \end{psli}
 
-\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{psli}[\ticolor{Title of second page\footnote{footnotes are often
+      not a good idea for a presentation}}]
+% \raggedright
+The second page with nested, ``vertically compressed'' lists using the
+\texttt{citemize} and \texttt{cenumerate} environments.
 
 \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 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}
+   \item final line in itemized list\footnote{\dots\ it is therefore
+       useful to write comments into a single footnote paragraph in order
+       to save space}
 \end{citemize}
 
-{\small For footnotes, the \texttt{footmisc} package, at least with the
+
+{\small For footnotes, the \texttt{footmisc} package, providing the
   options \texttt{perpage} and \texttt{symbol} is recommended. \par}
 \end{psli}
 
 
+\begin{psli}[\ticolor{Title of third page}]
+
+  \begin{cdescription}
+\item[environment name:] \texttt{cdescription}, comparable to
+    \LaTeX s \texttt{description} environment
+   \item[used for:] vertically compressed lists with small ``titles''
+\end{cdescription}
+
+\end{psli}
+
 \begin{rsli}
-A final page for freely arranged text and
-graphics\footnote{References to scientific publications may be added
-  as footnotes} 
+A final page with freely arranged text and
+graphics using the \texttt{rsli} environment\footnote{References to the
+  source of figures or tables may be added as footnotes}
+
+{ \tiny
+\begin{verbatim}
+               +
+              / \
+             /---\
+            /     \
+           /       \
+          /         \
+         /           \
+        +             +
+        |             |
+        |             |
+        |             |
+        |             |
+        |             |
+        |             |
+        |             |
+        +-------------+
+\end{verbatim}
+\par}
+
+... guess, what is this?\\[0.6ex]
+(A) House\\
+(B) Pencil
+
 \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 045f8dd0c4f..84953bc15c9 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 3cbbd024ee1..1fb50dddb6f 100644
--- a/Master/texmf-dist/doc/latex/elpres/elpres-manual.tex
+++ b/Master/texmf-dist/doc/latex/elpres/elpres-manual.tex
@@ -8,12 +8,14 @@
 \newcommand{\hoch}[1]{\raisebox{0.6ex}{#1}}
 \newcommand{\tief}[1]{\raisebox{-0.6ex}{#1}}
 \usepackage{url}
+\usepackage{framed}
+\usepackage{xcolor}
 
-\title{\textsf{elpres} --- electronic presentations \\ with (PDF)\LaTeX}
+\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}
+\date{v0.5\\[1.8ex]
+      July 12, 2020}
 \begin{document}
 \maketitle
 \thispagestyle{empty}
@@ -25,25 +27,31 @@
 
 \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 default ``virtual paper size''
+The \textsf{elpres} class can be used for presentations on a screen, a
+beamer or projector. It is derived from \LaTeX's \texttt{article} class and
+may be used with \LaTeX{}, pdf\LaTeX{} (and Lua\LaTeX ).
+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.
+4:3 (width:height) aspect ratio. Other aspect ratios for widescreen monitors
+may be selected
+by class options. The \textsf{elpres} class requires that the \texttt{ifthen},
+\texttt{fancyhdr},
+\texttt{hyperref},
+\texttt{graphicx},
+\texttt{xcolor}
+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
+\texttt{overlays})  and slides
 with a background from a bitmap (\texttt{wallpaper}, \texttt{eso-pic}
-packages). 
+packages).
+
 
 \section{Installation}
 
-Copy \texttt{elpres.cls} into  a directory, where your \LaTeX-system can find
-it and update the files database\footnote{e.\,g.  by using the
-\texttt{mktexlsr} or \texttt{texhash} command (TeXlive)}.
+Copy \texttt{elpres.cls} into  a directory, where
+your \LaTeX-system can find it and update the files database\footnote{e.\,g.
+by using the \texttt{mktexlsr} or \texttt{texhash} command (TeXlive)}.
 
 \section{Usage}
 
@@ -54,13 +62,33 @@ The class is used with
    \documentclass[options]{elpres}
 \end{verbatim}
 
-\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}. 
+\textbf{\texttt{Elpres}-specific options}: for font selection
+ \texttt{tmrfont} (Times Roman), \texttt{helvetfont}
+(Helvetica), \texttt{cmfont} (Computer Modern), \texttt{sansfont} (Sans
+Serif: default) and \texttt{nofonts} (no font selection, 
+intended for use of \texttt{elpres} with Lua\LaTeX\
+with is own font selection mechanisms) are used.
+Options for different screen aspect ratios: \texttt{4x3}
+(default), \texttt{16x9}, \texttt{16x10}. The option \texttt{navisymb}
+adds symbols for navigation to the presentation. 
+Options of the \texttt{article} class are also available for
+\texttt{elpres} presentations,
+e.\,g.  \texttt{10pt}, \texttt{11pt}, \texttt{12pt} for
+selection of font size. 
+
+{ \sloppy
+\textbf{\texttt{Elpres}-specific commands}:
+\verb+\distance+ vertically adjusts  text on a slide.
+The \verb+\auvimm+\footnote{for \textbf{au}dio \textbf{vi}deo \textbf{m}edia}
+command inserts a link to an external audio or video file.
+Two commands: \verb+\fromlinktext+ and \verb+\totargettext+
+can be used for internal links within a presentation.
+
+
+\textbf{\texttt{Elpres}-specific environments}:
+the environments \texttt{psli} and \texttt{rsli} define ``slides'' in
+\texttt{elpres}; \texttt{citemize}, \texttt{cenumerate} and
+\texttt{cdescription} provide vertically compressed lists.
 
 A simple example document:
 
@@ -98,19 +126,22 @@ A simple example document:
    \end{document}
 \end{verbatim}
 
-%% Options to be used are \texttt{10pt}, \texttt{11pt}, \texttt{12pt} (font size),
-%% \texttt{pdftex}, \texttt{dvips}
-%% (if you use \texttt{graphicx} and/or \texttt{color} packages).
 
-The title page can be created within the \texttt{titlepage} environment, the 
+%% Here a minimalistic example
+
+\subsection{Essential elements of an \texttt{elpres} presentation}
+
+The \textbf{title page} can be created within the \texttt{titlepage} environment, the 
 \verb+\maketitle+ command is not available.
-Slides may be created with the
-\texttt{psli}-environment\footnote{\texttt{psli}: plain slide}, you may add
+\textbf{Slides} may be created with the
+\texttt{psli}-environment\footnote{\texttt{psli}: \textbf{pl}ain
+  \textbf{sl}ide}, you may add
 the title of the slide with the optional parameter. 
 The contents of the slide are centered vertically.
 
-Another environment generating a slide is
-\texttt{rsli}\footnote{\texttt{rsli}: raw slide}: slides are written 
+Another environment generating a \textbf{slide} is
+\texttt{rsli}\footnote{\texttt{rsli}: \textbf{ra}w \textbf{sl}ide}:
+slides are written 
 without title,
 contents are not vertically centered. 
 
@@ -126,21 +157,23 @@ option resets numbering for each new slide. For a presentation, the
 After inserting a new footnote, numbers or symbols are correctly
 inserted only after a second run of \LaTeX.
 
-\subsection{Improving paragraph justification}
+\subsection{Alternatives to \TeX's justified paragraphs}
 
 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
+deficiencies: by inhibiting hypenation in texts with rather short lines,
+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. 
+\texttt{ragged2e} package. 
 
 
-\subsection{Generate vertically compressed lists}
+\subsection{Vertically compressed lists}
 
-The \texttt{elpres} package provides a ``vertically compressed''
-\texttt{itemize}-environment:
+As the spaces between lines may be too great with the \texttt{itemize}
+environment,
+the \texttt{elpres} package provides a ``vertically compressed''
+\texttt{citemize}-environment:
 
 \begin{verbatim}
    \begin{citemize}
@@ -169,8 +202,7 @@ parameters can be added in the format:
    \end{itemize} 
 \end{verbatim}
 
-The ``vertically
-compressed'' list can then be obtained with
+The ``vertically compressed'' list can then be obtained with
 
 \begin{verbatim}
    \begin{itemize}[nosep]
@@ -179,8 +211,8 @@ compressed'' list can then be obtained with
    \end{itemize}
 \end{verbatim}
 
-The \texttt{enumitem} package is also able to modify the \texttt{enumerate} and
-description \texttt{environments}.
+Similarly, the \texttt{enumitem} package is also able to modify the
+\texttt{enumerate} and description \texttt{environments}.
 
 
 
@@ -326,54 +358,200 @@ yellow as background:
 
 For more details on \texttt{overlays}, see the documentation of the package.
 
-\subsection{Create a ``handout'' from a presentation}
+
+\subsection{Navigation symbols}
+\label{sec:NavigationSymbols}
+
+With the \texttt{navisymb} option  a panel with navigation symbols
+(colored in light gray) appears
+in the right lower corner of the presentation:\\
+
+
+{ \setlength{\parindent}{2em}
+  \indent
+  \textbf{\texttt{$\ll$ $<$ $>$ $\gg$ $\leftarrow$ $\rightarrow$ [n]}}
+}\\
+
+These commands ($\ll$: jump to the first page,
+$<$: go to the previous page, $>$: go to the next page,
+$\gg$: jump to the last page, $\leftarrow$:
+go back in history, $\rightarrow$: go forward in history,
+\texttt{[n]}: prompt for a
+page number)
+work with Adobe Acrobat Reader (Windows), and (with the exception of
+\texttt{$\leftarrow$}, \texttt{$\rightarrow$} and \verb+[n]+)
+with \texttt{evince} (Linux).
+Some of these functions also work in presentation-mode
+of the ``internal'' PDF-viewer in recent versions of the
+\texttt{Firefox}-browser (Linux, Windows).
+
+
+\subsection{Call multimedia content from a presentation}
+\label{sec:MultimediaContent}
+
+
+The command \verb+\auvimm{text}{media-file}+ inserts \texttt{text} with
+a link, which calls the default application for audio or video media files
+\texttt{media-file}.
+This seems to work with Adobe Acrobat Reader (Windows) and with
+\texttt{evince} (Linux).
+An example for using this command:
+
+\begin{verbatim}
+   \auvimm{[sound-file]}{./audiofile.mp3}
+\end{verbatim}
+
+This produces the (text-based) ``button'' \texttt{[sound-file]}. If you
+hit it with the mouse pointer it will call the default application for
+audio files. This approach requires that you keep the presentation file
+together with the multimedia files in the same folder, \textbf{also at
+  the time of
+  the presentation}. On an unknown computer system (where you have to show
+your presentation) you should test this aspect of your presentation. Sometimes
+a call to an external program might be blocked due security reasons in Acrobat
+Reader.
+
+\begin{leftbar}
+This \texttt{elpres}-command should be considered experimental.
+Its behavior depends on the pdf-reader and the configuration of the OS.
+\end{leftbar}
+\subsection{Prepare 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:
+
+In advance of a lecture it is often expected that you
+prepare a ``handout'' from your presentation with more than one
+pages on a printed page. Therefore
+you have several options, two of them are described
+here.
+
+\subsubsection{\LaTeX\ article document with a series of single-page pdf-files included}
+
+One solution to this problem is (1) to generate a series of single-page
+pdf-files and (2) to create a pdf\LaTeX\ document with the single
+pages included.
+
+\textbf{(1)} can be done with \texttt{gs} (the Ghostscript program):
+
+\begin{verbatim}
+   gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite  -sOutputFile=page_%03d.pdf in.pdf
+\end{verbatim}
+
+with \texttt{in.pdf} as the initial presentation.  The syntax of \texttt{gs}
+is described in detail on the ghostscript
+website\footnote{\url{https://www.ghostscript.com/doc/current/Use.htm}}.
+An alternative to \texttt{gs} is \texttt{pdftk} tool:
 
 \begin{verbatim}
-   pdfjam --nup 2x3 --scale 0.9 -o new.pdf  presentation.pdf '1-4,7-17,22'
+    pdftk in.pdf  burst output  page_%02d.pdf
+\end{verbatim}
+
+The syntax of \texttt{pdftk} is explained in the documentation
+(\texttt{pdftk~--help}).
+
+\textbf{(2)} an example for a \LaTeX\ document which can serve as handout:
+
+\begin{verbatim}
+   \documentclass[12pt]{article}
+   \usepackage[pdftex]{graphicx}
+   \usepackage[latin1]{inputenc}
+   \usepackage[a4paper,hmargin=2.4cm,top=24mm,bottom=28mm]{geometry}
+   \newcommand{\PictScaleFact}{0.45}
+
+   \begin{document}
+   \centering
+   \fbox{\includegraphics[width=\PictScaleFact\textwidth]{page_001.pdf}}
+   \hspace{5mm}
+   \fbox{\includegraphics[width=\PictScaleFact\textwidth]{page_002.pdf}}
+   \\[2ex]
+   \fbox{\includegraphics[width=\PictScaleFact\textwidth]{page_003.pdf}}
+   \hspace{5mm}
+   % ...
+   \fbox{\includegraphics[width=\PictScaleFact\textwidth]{page_008.pdf}}
+   % ...
+   \end{document}
+\end{verbatim}
+
+\subsubsection{Convert presentation pdf-file directly into handout file with \texttt{pdfjam}}
+
+With the following command:
+
+\begin{verbatim}
+   pdfjam --nup 2x4 --frame true --scale 0.9 -o new.pdf in.pdf '1-4,6-22'   
 \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
+\texttt{pdfjam}\footnote{which regerettably is only available on
+Linux or other Unix-like systems}
+creates a ``handout'' PDF document (\texttt{new.pdf}) fom
+\texttt{in.pdf} with the slides nr. 1-4,6-22
+arranged in  two columns and four 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.
+man page and the project
+website\footnote{https://github.com/DavidFirth/pdfjam/blob/master/README.md}. 
 \end{sloppypar}
 
+
+
 \subsection{Create presentations with hypertext elements}
 
 \label{secHypertext}
 
-You may use the hyperref package. As you normally will not insert
-\verb+\section{}+-like commands, it is easier to define links with
+You may use two commands \verb+\fromlinktext{}{}+ and \verb+\totargettext{}{}+
+for ``hypertext features''.  As an example: as you normally will not insert
+\verb+\section{}+-like commands and therefore do not generate a ``table of
+contents''-like page or a menu in \texttt{elpres}-presentations, you are able
+define links with:
 
 \begin{verbatim}
-   \hypertarget{target-name}{text}
+   \totargettext{text}{link-label}
 \end{verbatim}
+% \hypertarget{target-name}{text}
+
 
 which can be addressed by
 
 \begin{verbatim}
-   \hyperlink{target-name}{text}
+   \fromlinktext{text}{link-label}
 \end{verbatim}
 
-The hyperref package will produce a warning message, if you use the
-titlepage-environment (this is inherited from the article class). To avoid
-the warning you can use the \texttt{rsli}-environment for the titlepage and use
-\verb+\thispagestyle{empty}+ to suppress the page number on the title.
+% \hyperlink{target-name}{text}
+
+If you use these commands to generate a \textbf{menu page} (as a hyperlinked
+table of contents) with items pointing to
+specific slides: 
+\texttt{link-label} acts as label, \texttt{text} in the
+\verb+\fromlinktext+ command is converted to a link (e.\,g. on a menu-page).
+If you click on this text ``button'', you jump to
+the \texttt{text} labelled with
+\verb+\totargettext+; \texttt{link-label} has to be identical in a
+\verb+\fromlinktext+ and \verb+\totargettext+ pair,
+\texttt{text} in the link
+and the target, of course need not to be identical.
+
+The default for the link border color is red, it may be changed with
+\verb+\hypersetup{}+, a command from the \texttt{hyperref}
+package\footnote{both, \texttt{\textbackslash totargettext} and
+\texttt{\textbackslash fromlinktext} are
+are redefinitions of commands from the \texttt{hyperref} package}.
+The option for the color of the frame around the link is
+\texttt{linkbordercolor},
+colors must be defined whith three figures \texttt{[0..1]} according to the RGB
+color model:
 
-\subsection{Fill background of a presentation with bitmaps}
+\begin{verbatim}
+   \hypersetup{linkbordercolor={0.6 0.6 0.6}}
+\end{verbatim}
 
+This defines a light gray color for the link border, more details on
+\verb+\hypersetup{}+ are
+described in the documentation of the \texttt{hyperref} package.
+
+\subsection{Fill background of a presentation with bitmaps}
 
 \label{secBackgroundWallpaper}
 
@@ -441,7 +619,7 @@ This class is distributed under the \textsl{\LaTeX{} Project Public License}
 \url{http://www.latex-project.org/lppl.txt}. No warranty is provided for this
 work (as stated in the LPPL).
 
-\section{Versions}
+\section{Version history}
 
 \textbf{v0.1} (19.6.2004):  initial version.
 \textbf{v0.2} (1.9.2004): page numbers now changed to footnotesize, left and
@@ -458,7 +636,7 @@ added).
 \textbf{v0.2e} (15.04.2005): Documentation completed (sections
 \ref{secBackgroundEsopic} and \ref{secHandout} added).
 \textbf{v0.3} (12.08.2005): new  (class) options for font selection:
-\texttt{tmrfont} (Times Roman), \texttt{helvetfont} (Helevetica),
+\texttt{tmrfont} (Times Roman), \texttt{helvetfont} (Helvetica),
 \texttt{cmfont} (Computer Modern), \texttt{sansfont} (Sans Serif: default).
 Documentation updated, sections \ref{secInclGraphicsFiles} and
 \ref{secTwoColumns} added.
@@ -468,8 +646,15 @@ 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
+\textbf{v0.4a} (24.01.2018): Documentation completed.
+\textbf{v0.5} (12.07.2020): New class options: \texttt{nofonts}
+(no font selection) and \texttt{navisymb} (inserts a panel of
+symbols for navigation), new commands: \verb+auvimm+ (generates
+a link to external audio, video files), \verb+\fromlinktext+ and
+\verb+\totargettext+ (create links within a presentation).
+Documentation has been partly rewritten.
+
 \end{document}
 
 
-%  vim:set spell:set fileencoding=latin1:
+%  vim:spell:fileencoding=latin1:lines=55:
diff --git a/Master/texmf-dist/tex/latex/elpres/elpres.cls b/Master/texmf-dist/tex/latex/elpres/elpres.cls
index 11ccb14b622..b1786496d31 100644
--- a/Master/texmf-dist/tex/latex/elpres/elpres.cls
+++ b/Master/texmf-dist/tex/latex/elpres/elpres.cls
@@ -1,5 +1,5 @@
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesClass{elpres}[2018/01/24 class for plain electronic presentations]
+\ProvidesClass{elpres}[2020/07/12 class for plain electronic presentations]
 %
 % 2004/06/19 v0.1  - initial version
 %
@@ -18,9 +18,19 @@
 %
 % 2018/01/24 v0.4a - documentation completed
 %
+% 2020/07/12 v0.5  - class option `navisymb' added; elpres now also requires
+%                    the hyperref and xcolor packages. New commands:
+%                    `auvimm', `fromlinktext' `totargettext'.
+%                    new class option `nofonts' for use with lualatex.
+%                  - documentation updated
+%
+%
 
 % Options: select fonts
 \newcommand{\fontna}{initialisiert}
+\DeclareOption{nofonts}{%
+  \renewcommand{\fontna}{withoutfont}%
+}
 \DeclareOption{tmrfont}{%
   \renewcommand{\familydefault}{\rmdefault}%
   \renewcommand{\fontna}{tmrfo}%
@@ -54,12 +64,18 @@
 }
 
 
+% Option: navigation symbols
+\newcommand{\navigation}{withoutnavigationsymb}
+\DeclareOption{navisymb}{%
+  \renewcommand{\navigation}{withnavi}%
+}
+
 \DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
 \ProcessOptions\relax
 \LoadClass{article}
 
-
 \RequirePackage{ifthen}
+\RequirePackage{xcolor}
 
 \ifthenelse{\equal{\screenformat}{scr4x3}}{%
 \RequirePackage[foot=10.2pt,head=0pt,paperwidth=128mm,paperheight=96mm,left=5mm,top=5mm,right=7mm,bottom=8mm]{geometry}%
@@ -73,7 +89,10 @@
 \RequirePackage[foot=10.2pt,head=0pt,paperwidth=160mm,paperheight=100mm,left=5mm,top=5mm,right=7mm,bottom=8mm]{geometry}%
 }{}
 
+
+\RequirePackage[hyperfootnotes=false]{hyperref}
 \RequirePackage{fancyhdr}
+
 \renewcommand{\headrulewidth}{0mm}
 %% \pagestyle{fancy}
 %% \rfoot{\thepage}
@@ -85,6 +104,7 @@
   {Please use ``titlepage'' environment instead}%
 }
 
+
 \fancypagestyle{pres}{%
 \fancyhf{}%
 \fancyfoot[RO]{\footnotesize \thepage}%
@@ -92,6 +112,22 @@
 
 \pagestyle{pres}
 
+%% menu for navigation symbols
+\ifthenelse{\equal{\navigation}{withnavi}}{%
+\hypersetup{menubordercolor=white}%
+\rfoot{% 
+    \scriptsize%
+     \textcolor[gray]{0.6}{%
+     \Acrobatmenu{FirstPage}{$\ll$}\hspace{0.5em}%
+     \Acrobatmenu{PrevPage}{$<$}\hspace{0.5em}%
+     \Acrobatmenu{NextPage}{$>$}\hspace{0.5em}%
+     \Acrobatmenu{LastPage}{$\gg$}\hspace{0.5em}%
+     \Acrobatmenu{GoBack}{$\leftarrow$}\hspace{0.5em}%
+     \Acrobatmenu{GoForward}{$\rightarrow$}\hspace{0.5em}%
+     \Acrobatmenu{GoToPage}{[n]}\hspace{1.2em}%
+   }\footnotesize \thepage}%
+}{}%
+
 \newcommand{\distance}[1]{\vspace*{\stretch{#1}}}
 \newcommand{\abstand}[1]{\vspace*{\stretch{#1}}}
 
@@ -142,5 +178,11 @@
 \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}}{}
+\ifthenelse{\equal{\fontna}{withoutfont}}{}{}
+
+\newcommand{\auvimm}[2]{\href{#2}{#1}}
+
+\newcommand{\fromlinktext}[2]{\hyperlink{#2}{#1}}
+\newcommand{\totargettext}[2]{\hypertarget{#2}{#1}}
 
 % vim: syntax=tex tw=2048 ai