% $Header: /cvsroot/latex-beamer/latex-beamer/doc/beamerug-nonpresentation.tex,v 1.4 2004/10/07 20:53:05 tantau Exp $


% Copyright 2003, 2004 by Till Tantau <tantau@users.sourceforge.net>.
%
% This program can be redistributed and/or modified under the terms
% of the GNU Public License, version 2.


\section{Managing Non-Presentation Versions and Material}

\label{section-modes}

The \beamer\ package offers different ways of creating special
versions of your talk and adding material that is not shown during
the presentation. You can create a \emph{handout} version of the
presentation that can be distributed to the audience. You can also
create a version that is more suitable for a presentation using an
overhead projector. You can add notes for yourself that help
you remember what to say for specific slides. Finally, you can have a
completely independent ``article'' version of your presentation 
coexist in your main file. All special versions are created by
specifying different class options and rerunning \TeX\ on the main
file. 






\subsection{Creating Handouts}

\label{handout}

A \emph{handout} is a version of a presentation in which the slides
are printed on paper and handed out to the audience before or after
the talk. (See Section~\ref{section-postscript} for how to place
numerous frames on one page, which is very useful for handouts.)  For
the handout you typically want to produce as few slides as possible
per frame. In particular, you do not want to print a new slide for
each slide of a frame. Rather, only the ``last'' slide should be
printed.  

In order to create a handout, specify the class option
|handout|. If you do not specify anything else, this will cause
all overlay specifications to be suppressed. For most cases this will
create exactly the desired result.

\begin{classoption}{handout}
  Create a version that uses the |handout| overlay specifications.
\end{classoption}

In some cases, you may want a more complex behaviour. For example, if
you use many |\only| commands to draw an animation. In this case,
suppressing all overlay specifications is not such a good idea, since
this will cause all steps of the animation to be shown at the same
time. In some cases this is not desirable. Also, it might be desirable
to suppress some |\alert| commands that apply only to specific
slides in the handout.

For a fine-grained control of what is shown on a handout, you can use
\emph{mode specifications}. They specify which slides
 of a frame should be shown for a special version, for example for the
handout version. As explained in
Section~\ref{section-concept-overlays}, a mode specification is written
alongside the normal overlay specification inside the pointed
brackets. It is separated from the normal specification by a vertical
bar and a space. Here is an example:
\begin{verbatim}
  \only<1-3,5-9| handout:2-3,5>{Text}
\end{verbatim}
This specification says: ``Normally (in |beamer| mode), insert the
text on slides 1--3 and 5--9. For the handout version, insert the text
only on slides 2,~3, and~5.'' If no special mode specification is
given for handouts, the default is ``always.'' This causes the
desirable effect that if you do not specify anything, the overlay
specification is effectively suppressed for the handout.

An especially useful specification is the following:
\begin{verbatim}
  \only<3| handout:0>{Not shown on handout.}
\end{verbatim}
Since there is no zeroth slide, the text is not shown. Likewise,
\verb!\alert<3| handout:0>{Text}! will not alert the text on a
handout.

You can also use a mode specification for the overlay specification
of the |\frame| command as in the following example.
\begin{verbatim}
\frame<1-| handout:0>{Text...}
\end{verbatim}
This causes the frame to be suppressed in the handout version. Also,
you can restrict the presentation such that only specific slides of
the frame are shown on the handout:
\begin{verbatim}
\frame<1-| handout:4-5>{Text...}
\end{verbatim}

It is also possible to give only an alternate overlay
specification. For example, |\alert<handout:0>{...}| causes the
text to be always hilighted during the presentation, but never on the
handout version. Likewise, |\frame<handout:0>{...}| causes the
frame to be suppressed for the handout.

Finally, note that it is possible to give more than one alternate
overlay specification and in any order. For example, the following
specification states that the text should be inserted on the first
three slides in the presentation, in the first two slides of the
transparency version, and not at all in the handout.
\begin{verbatim}
  \only<trans:1-2| 1-3| handout:0>{Text}
\end{verbatim}

If you wish to give the same specification in all versions, you can do
so by specifying |all:| as the version. For example,
\begin{verbatim}
\frame<all:1-2>{blah...}
\end{verbatim}
ensures that the frame has two slides in all versions. 




\subsection{Creating Transparencies}

\label{trans}

The main aim of the \beamer\ class is to create presentations for
beamers. However, it is often useful to print transparencies as
backup, in case the hardware fails. A transparencies version of a talk
often has less slides than the main version, since it takes more time
to switch slides, but it may have more slides than the handout
version. For example, while in a handout an animation might be
condensed to a single slide, you might wish to print several slides
for the transparency version.

You can use the same mechanism as for creating handouts: Specify
|trans| as a class option and add alternate transparency
specifications for the |trans| version as needed. An elaborated
example of different overlay specifications for the presentation, the
handout, and the transparencies can be found in the file
|beamerexample1.tex|.

\begin{classoption}{trans}
  Create a version that uses the |trans| overlay
  specifications. 
\end{classoption}

When printing a presentation using Acrobat, make sure that the option
``expand small pages to paper size'' in the printer dialog is
enabled. This is necessary, because slides are only 128mm times 96mm.



\subsection{Adding Notes}

A \emph{note} is a small piece of paper that is intended as a reminder
to yourself of what you should say or should keep in 
mind when presenting a slide.



\subsubsection{Specifying Note Contents}

To add a note to a slide or a frame, you should use the |\note|
command. This command can be used both inside and outside frames, but
it has quite different behaviors then: Inside frames, |\note| commands
accumulate and append a single note page after the current slide;
outside frames each |\note| directly inserts a single note page with
the given parameter as contents. Using the |\note| command inside
frames is usually preferably over using them outside, since only
commands issued inside frames profit from the class option
|onlyslideswithnotes|, see below.

\lyxnote
In \LyX, only the inside-frame |\note| command with the option
|[item]| is available in the form of the NoteItem style. 

Inside a frame, the effect of |\note|\meta{text} is the following:
When you use it somewhere inside the frame on a specific slide, a note
page is created after the slide, containing the \meta{text}. Since you
can add an overlay specification to the |\note| command, you can
specify after which slide the note should be shown. If you use
multiple |\note| commands on one slide, they ``accumulate'' and are
all shown on the same note.

To make the accumulation of notes more convenient, you can use the
|\note| command with the option |[item]|. The notes added with this
option are accumulated in an |enumerate| list that follows any text
inserted using |\note|. 

The following example will produce one note page that follows the
second slide and has two entries. 

\begin{verbatim}
\begin{frame}
  \begin{itemize}
  \item<1-> Eggs
  \item<2-> Plants
    \note[item]<2>{Tell joke about plants.}
    \note[item]<2>{Make it short.}
  \item<3-> Animals
  \end{itemize}
\end{frame}
\end{verbatim}


Outside frames, the command |\note| creates a single note page. It
is ``independent'' of any usage of the |\note| commands
inside the previous frame. If you say |\note| inside a frame and
|\note| right after it, \emph{two} note pages are created.

In the following, the syntax and effects of the |\note| command
\emph{inside} frames is described:

\begin{command}{\note\sarg{overlay
      specification}\oarg{options}\marg{note text}}
  Effects \emph{inside} frames:
  
  This command appends the \meta{note text} to
  the note that follows the current slide. Multiple uses of this
  command on a slide accumulate. If you 
  do not specify an \meta{overlay specification}, the 
  note will be added to \emph{all} slides of the current frame. This
  is often not what you want, so adding a specification like |<1>| is
  usually a good idea.

  The following \meta{options} may be given:
  \begin{itemize}
  \item \declare{|item|} causes the note to be put as an item in a
    list that is shown at the end of the note page.
  \end{itemize}
    
  \example|\note<2>{Do not talk longer than 2 minutes about this.}|

  \articlenote
  Notes are ignored in |article| mode.

  \lyxnote
  Use the NoteItem style to insert a note item. 
\end{command}


Next, the syntax and effects of the |\note| command
\emph{outside} frames are described:

\begin{command}{\note\oarg{options}\marg{note text}}
  Outside frames, this command creates a note page. This command is  
  \emph{not} affected by the option |notes=onlyframeswithnotes|, see
  below.

  The following \meta{options} may be given:
  \begin{itemize}
  \item \declare{|itemize|} will enclose the whole note page in an
    |itemize| environment. This is just a convenience.
  \item \declare{|enumerate|} will enclose the whole note page in an
    |enumerate| environment.
  \end{itemize}
  
  \example
\begin{verbatim}
\frame{some text}
\note{Talk no more than 1 minute.}

\note[enumerate]
{
\item Stress this first.
\item Then this.
}
\end{verbatim}

  \articlenote
  Notes are ignored in |article| mode.
\end{command}


The following element dictates who the note pages are rendered:
\begin{element}{note page}\yes\yes\yes
  This template is used to typeset a note page.  The
  template should contain a mentioning of the insert |\insertnote|,
  which will contain the note text. To squeeze more onto note pages
  you might consider changing the size of the \beamer-font |note page|
  to something small. The default is |\small|.
  \begin{templateoptions}
    \itemoption{default}{}
    The default template shows the last slide in the upper right
    corner and some ``hints'' that should help you match a note page
    to the slide that is currently shown.
    \itemoption{compress}{}
    The option produces an output that is similar to the default, only
    more fits onto each note page at the price of legibility.
    \itemoption{plain}{}
    Just inserts the note text, no fancy hints.
  \end{templateoptions}
  The following two inserts are useful for note pages:
  \begin{itemize}
    \iteminsert{\insertnote}
    Inserts the text of the current note into the template.
    \iteminsert{\insertslideintonotes}\marg{magnification}
    Inserts a ``mini picture'' of the last slide into the current
    note. The slide will be scaled by the given magnification.

    \example |\insertslideintonotes{0.25}|

    This will give a mini slide whose width and height are one fourth of
    the usual size.
  \end{itemize}
\end{element}



\subsubsection{Specifying Which Notes and Frames Are Shown}

Since you normally do not wish the notes to be part of your
presentation, you must explicitly specify the class option
|notes| to include notes. If this option is not specified, notes
are suppressed.

The |notes| class option takes several parameters whose effects are
explained in the following.


\begin{classoption}{notes=hide}
  Notes are not shown. This is the default in a presentation.
\end{classoption}

\begin{classoption}{notes=show}
  Include notes in the output file. Normal slides are also included. 
\end{classoption}

\begin{classoption}{notes=only}
  Include only the notes in the output file and suppresses all
  frames. Useful for printing them. If you specify this command, the
  |.aux| and |.toc| files are \emph{not} updated. So, if you add a
  section and re\TeX\ your presentation, this will not be reflected in
  the navigation bars (which you do not see anyway since only notes
  are output).
\end{classoption}

\begin{classoption}{notes=onlyslideswithnotes}
  This includes all notes and those slides that \emph{contain} a
  |\note|. Frames that are just ``followed'' by a |\note| command will
  not be included. 

  If you use only |\note| commands, this option will cause the frames
  and the notes that apply to them to be nicely paired. This is useful
  for printing.
\end{classoption}







\subsection{Creating an Article Version}

\label{section-article}

In the following, the ``article version'' of your presentation refers
to a normal \TeX\ text typeset using, for example, the document class
|article| or perhaps |llncs| or a similar document
class. This version of the presentation will typically follow
different typesetting rules and may even have a different
structure. Nevertheless, you may wish to have this version coexist
with your presentation in one file and you may wish to share some part
of it (like a figure or a formula) with your presentation.



\subsubsection{Starting the Article Mode}

The article mode of a presentation is created by specifying |article|
or |book| or some other class as the document class instead of
|beamer| and by then loading the package |beamerarticle|.

The package |beamerarticle| defines virtually all of \beamer's
commands in a way that is sensible for the |article| mode. Also,
overlay specifications can be given to commands like |\textbf| or
|\item| once |beamerarticle| has been 
loaded. Note that, except for |\item|, these overlay specifications
also work: by writing |\section<presentation>{Name}| you will suppress
this section command in the article version. For the exact effects
overlay specifications have in |article| mode, please see the
descriptions of the commands to which you wish to apply them.

\begin{package}{{beamerarticle}\opt{|[|\meta{options}|]|}}
  Makes most \beamer\ commands available for another document class.

  The following \meta{options} may be given:
  \begin{itemize}
  \item
    \declare{|activeospeccharacters|} will leave the character code of
    the pointed brackets as specified by
    other packages. Normally, \beamer\ will turn off the special
    behaviour of the two characters |<| and |>|. Using this option,
    you can reinstall the original behaviour at the price of possible
    problems when using overlay specifications in the |article| mode.
  \item
    \declare{|noamsthm|} will suppress the loading of the |amsthm|
    package. No theorems will be defined.
  \item
    \declare{|notheorem|} will suppress the definition of standard
    environments like |theorem|, but |amsthm| is still loaded and the
    |\newtheorem| command still makes the defined environments
    overlay-specification-aware. Using this option allows you to
    define the standard environments in whatever way you like while
    retaining the power of the extensions to |amsthm|.    
  \item
    \declare{|envcountsect|} causes theorem, definitions and the like
    to be numbered with each section. Thus instead of Theorem~1 you
    get Theorem~1.1. I recommend using this option.
  \item
    \declare{|noxcolor|} will suppress the loading of the |xcolor|
    package. No colors will be defined.
  \end{itemize}

  \example
\begin{verbatim}
\documentclass{article}
\usepackage{beamerarticle}
\begin{document}
\begin{frame}
  \frametitle{A frame title}
  \begin{itemize}
  \item<1-> You can use overlay specifications.
  \item<2-> This is useful.
  \end{itemize}
\end{frame}
\end{document}
\end{verbatim}
\end{package}

There is one remaining problem: While the |article| version can easily
\TeX\ the whole file, even in the presence of commands like
|\frame<2>|, we do not want the special article text to be inserted
into our original \beamer\ presentation. That means, we would like all
text \emph{between} frames to be suppressed. More precisely, we want
all text except for commands like |\section| and so on to be
suppressed. This behaviour can be enforced by specifying the option
|ignorenonframetext| in the presentation version. The option will
insert a |\mode*| at the beginning of your presentation. 

The following example shows a simple usage of the |article| mode:

\begin{verbatim}
\documentclass[a4paper]{article}
\usepackage{beamerarticle}
%%\documentclass[ignorenonframetext,red]{beamer}

\mode<article>{\usepackage{fullpage}}
\mode<presentation>{\usetheme{Berlin}}

%% everyone:
\usepackage[english]{babel}
\usepackage{pgf}

\pgfdeclareimage[height=1cm]{myimage}{filename}

\begin{document}

\section{Introduction}

This is the introduction text. This text is not shown in the
presentation, but will be part of the article.

\begin{frame}
  \begin{figure}
    % In the article, this is a floating figure,
    % In the presentation, this figure is shown in the first frame
    \pgfuseimage{myimage}
  \end{figure}
\end{frame}

This text is once more not shown in the presentation.

\section{Main Part}

While this text is not shown in the presentation, the section command
also applies to the presentation.

We can add a subsection that is only part of the article like this:

\subsection<article>{Article-Only Section}

With some more text.

\begin{frame}
  This text is part both of the article and of the presentation.
  \begin{itemize}
  \item This stuff is also shown in both version.
  \item This too.
  \only<article>{\item This particular item is only part
      of the article version.}
  \item<presentation:only@0> This text is also only part of the article.
  \end{itemize}
\end{frame}
\end{document}
\end{verbatim}

There is one command whose behaviour is a bit special in |article|
mode: The line break command |\\|. Inside frames, this command has no
effect in |article| mode, except if an overlay specification is
present. Then it has the normal effect dictated by the
specification. The reason for this behaviour is that you will
typically inserts lots of |\\| commands in a presentation in order to
get control over all line breaks. These line breaks are mostly
superfluous in |article| mode. If you really want a line break to
apply in all versions, say |\\<all>|. Note that the command |\\| is
often redefined by certain environments, so it may not always be
overlay-specification-aware. In such a case you have to write
something like |\only<presentation>{\\}|.




\subsubsection{Workflow}
\label{section-article-version-workflow}
The following workflow steps are optional, but they can simplify the
creation of the article version.

\begin{itemize}
\item 
  In the main file |main.tex|, delete the first line, which sets the
  document class.
\item
  Create a file named, say, |main.beamer.tex| with the
  following content:
\begin{verbatim}
\documentclass[ignorenonframetext]{beamer}
\input{main.tex}
\end{verbatim} 
\item
  Create an extra file named, say, |main.article.tex| with the
  following content:
\begin{verbatim}
\documentclass{article}
\usepackage{beamerarticle}
\setjobnamebeamerversion{main.beamer}
\input{main.tex}
\end{verbatim}
\item
  You can now run |pdflatex| or |latex| on the two files
  |main.beamer.tex| and |main.article.tex|. 
\end{itemize}

The command |\setjobnamebeamerversion| tells the article version where
to find the presentation version. This is necessary if you wish to include
slides from the presentation version in an article as figures.

\begin{command}{\setjobnamebeamerversion\marg{filename without extension}}
  Tells the \beamer\ class where to find the presentation version of the
  current file.  
\end{command}

An example of this workflow approach can be found in the |examples|
subdirectory for files starting with |beamerexample2|.



\subsubsection{Including Slides from the Presentation Version in the
  Article Version}

If you use the package |beamerarticle|, the |\frame| command
becomes available in |article| mode. By adjusting the frame template,
you can ``mimic'' the appearance of frames typeset by \beamer\ in
your articles. However, sometimes you may wish to insert ``the real
thing'' into the |article| version, that is, a precise ``screenshot''
of a slide from the presentation. The commands introduced in the
following help you do exactly this.

In order to include a slide from your presentation in your article
version, you must do two things: First, you must place a normal
\LaTeX\ label on the slide using the |\label| command. Since this
command is overlay-specification-aware, you can also select specific
slides of a frame. Also, by adding the option |label=|\meta{name} to
a frame, a label \meta{name}|<|\meta{slide number}|>| is automatically
added to each slide of the frame.

Once you have labeled a slide, you can use the following command in
your article version to insert the slide into it:

\begin{command}{\includeslide\oarg{options}\marg{label name}}
  This command calls |\pgfimage| with the given \meta{options} for
  the file specified by
  \begin{quote}
    |\setjobnamebeamerversion|\meta{filename}
  \end{quote}
  Furthermore, the option |page=|\meta{page of label name} is passed
  to |\pgfimage|, where the \meta{page of label name} is read
  internally from the file \meta{filename}|.snm|.
  \example

\begin{verbatim}
\article
  \begin{figure}
    \begin{center}
      \includeslide[height=5cm]{slide1}
    \end{center}
    \caption{The first slide (height 5cm). Note the partly covered second item.}
  \end{figure}
  \begin{figure}
    \begin{center}
      \includeslide{slide2}
    \end{center}
    \caption{The second slide (original size). Now the second item is also shown.}
  \end{figure}
\end{verbatim}  
\end{command}

The exact effect of passing the option |page=|\meta{page of label
  name} to the command |\pgfimage| is explained in the documentation
of |pgf|. In essence, the following happens:
\begin{itemize}
\item
  For old version of |pdflatex| and for any version of |latex|
  together with |dvips|, the |pgf| package will look for a file named
  \begin{quote}
    \meta{filename}|.page|\meta{page of label name}|.|\meta{extension}
  \end{quote}
  For each page of your |.pdf| or |.ps| file that is to be included in
  this way, you must create such a file by hand. For example, if the
  PostScript file of your presentation version is named
  |main.beamer.ps| and you wish to include the slides with page
  numbers 2 and~3, you must create (single page) files
  |main.beamer.page2.ps| and |main.beamer.page3.ps| ``by hand'' (or
  using some script). If these files cannot be found, |pgf| will
  complain.
\item
  For new versions of |pdflatex|, |pdflatex| also looks for the files
  according to the above naming scheme. However, if it fails to find
  them (because you have not produced them), it uses a special
  mechanism to directly extract the desired page from the presentation
  file |main.beamer.pdf|.
\end{itemize}




\subsection{Details on Modes}

\label{section-mode-details}

This subsection describes how modes work exactly and how you can use
the |\mode| command to control what part of your text belongs to which
mode. 

When \beamer\ typesets your text, it is always in one of the following
four modes:
\begin{itemize}
\item
  \declare{|beamer|} is the default mode.
\item
  \declare{|handout|} is the mode for creating handouts.
\item
  \declare{|trans|} is the mode for creating transparencies.
\item
  \declare{|article|} is the mode when control has been transferred to
  another class, like |article.cls|. Note that the mode is also
  |article| if control is transferred to, say, |book.cls|.
\end{itemize}

In addition to these modes, \beamer\ recognizes the following
names for modes sets:

\begin{itemize}
\item
  \declare{|all|} refers to all modes.
\item
  \declare{|presentation|} refers to the first three modes, that is,
  to all modes except for the |article| mode.
\end{itemize}

Depending on the current mode, you may wish to have certain text
inserted only in that mode. For example, you might wish a certain
frame or a certain table to be left out of your article version. In
some situations, you can use the |\only| command for this
purpose. However, the command |\mode|, which is described in the
following, is much more powerful than |\only|.

The command actually comes in three ``flavors,'' which only slightly
differ in syntax. The first, and simplest, is the version that takes
one argument. It behaves essentially the same way as |\only|.

\begin{command}{\mode\sarg{mode specification}\marg{text}}
  Causes the \meta{text} to be inserted only for the specified
  modes. Recall that a \meta{mode specification} is just an overlay
  specification in which no slides are mentioned.

  The \meta{text} should not do anything fancy that involves mode
  switches or including other files. In particular, you should not put
  an |\include| command inside \meta{text}. Use the argument-free form
  below, instead.

  \example
\begin{verbatim}
\mode<article>{Extra detail mentioned only in the article version.}

\mode
<beamer| trans>
{\frame{\tableofcontents[currentsection]}}
\end{verbatim}
\end{command}

The second flavor of the |\mode| command takes no argument. ``No
argument'' means that it is not followed by an opening brace, but any
other symbol. 

\begin{command}{\mode\sarg{mode specification}}
  In the specified mode, this command actually has no effect. The
  interesting part is the effect in the non-specified modes: In these
  modes, the command causes \TeX\ to enter a kind of ``gobbling''
  state. It will now ignore all following lines until the next
  line that has a sole occurrence of one of the following commands:
  |\mode|, |\mode*|, |\begin{document}|, |\end{document}|. Even a comment on
  this line will make \TeX\ skip it. Note that the line with the
  special commands that make \TeX\ stop gobbling may not directly
  follow the line where the gobbling is started. Rather, there must
  either be one non-empty line before the special command or at least
  two empty lines.

  When \TeX\ encounters a single |\mode| command, it will execute this
  command. If the command is |\mode| command of the first flavor,
  \TeX\ will resume its ``gobbling'' state after having inserted (or
  not inserted) the argument of the |\mode| command. If the |\mode|
  command is of the second flavor, it takes over.

  Using this second flavor of |\mode| is less convenient than the
  first, but there are different reasons why you might need to use it:
  \begin{itemize}
  \item
    The line-wise gobbling is much faster than the gobble of the third
    flavor, explained below.
  \item
    The first flavor reads its argument completely. This means, it
    cannot contain any verbatim text that contains unbalanced braces.
  \item
    The first flavor cannot cope with arguments that contain
    |\include|. 
  \item
    If the text mainly belongs to one mode with only small amounts of
    text from another mode inserted, this second flavor is nice to
    use.
  \end{itemize}

  \emph{Note:} When searching line-wise for a |\mode| command to shake
  it out of its gobbling state, \TeX\ will not recognize a |\mode|
  command if a mode specification follows on the same line. Thus, such
  a specification must be given on the next line.

  \emph{Note:} When a \TeX\ file ends, \TeX\ must not be in the
  gobbling state. Switch this state off using |\mode| on one line and
  |<all>| on the next.
  
  \example
\begin{verbatim}
\mode<article>

This text is typeset only in |article| mode.
\verb!verbatim text is ok {!

\mode
<presentation>
{ % this text is inserted only in presentation mode
\frame{\tableofcontents[currentsection]}}

Here we are back to article mode stuff. This text
is not inserted in presentation mode

\mode
<presentation>

This text is only inserted in presentation mode.
\end{verbatim}
\end{command}

The last flavor of the mode command behaves quite differently.

\begin{command}{\mode\declare{|*|}}
  The effect of this mode is to ignore all text outside frames in the
  |presentation| modes. In article mode it has no effect.

  This mode should only be entered outside of frames. Once entered, if
  the current mode is a |presentation| mode, \TeX\ will enter a
  gobbling state similar to the gobbling state of the second
  ``flavor'' of the |\mode| command. The difference is that the text
  is now read token-wise, not line-wise. The text is gobbled token by
  token until one of the following tokens is found: |\mode|, |\frame|,
  |\againframe|, |\part|, |\section|, |\subsection|, |\appendix|,
  |\note|, |\begin{frame}|, and |\end{document}| (the last two are
  really tokens, but they are recognized anyway).

  Once one of these commands is encountered, the gobbling stops and
  the command is executed. However, all of these commands restore the
  mode that was in effect when they started. Thus, once the command is
  finished, \TeX\ returns to its gobbling.

  Normally, |\mode*| is exactly what you want \TeX\ to do outside of
  frames: ignore everything except for the above-mentioned commands
  outside frames in |presentation| mode. However, there are  cases
  in which you have to use the second flavor of the |\mode| command
  instead: If you have verbatim text that contains one of the commands,
  if you have very long text outside frames, or if you wish some text
  outside a frame (like a definition) to be executed also in
  |presentation| mode.

  The class option |ignorenonframetext| will switch on |\mode*| at the
  beginning of the document.

  \example
\begin{verbatim}
\begin{document}
\mode*

This text is not shown in the presentation.

\begin{frame}
  This text is shown both in article and presentation mode.
\end{frame}

this text is not shown in the presentation again.

\section{This command also has effect in presentation mode}

Back to article stuff again.

\frame<presentation>
{ this frame is shown only in the presentation. }
\end{document}
\end{verbatim}

  \example The following example shows how you can include other files
  in a main file. The contents of a |main.tex|:

\begin{verbatim}
\documentclass[ignorenonframetext]{beamer}
\begin{document}
This is star mode stuff.

Let's include files:
\mode<all>
\include{a}
\include{b}
\mode*

Back to star mode
\end{document}
\end{verbatim}

  And |a.tex| (and likewise |b.tex|):
\begin{verbatim}
\mode*
\section{First section}
Extra text in article version.
\begin{frame}
  Some text.
\end{frame}
\mode<all>
\end{verbatim}  
\end{command}



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