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+% $Header: /cvsroot/latex-beamer/latex-beamer/doc/beamerug-transparancies.tex,v 1.1 2004/12/08 11:21:23 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{Creating Transparancies}
+
+\label{section-trans}
+\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.
+
+In order to create a transparencies version, specify the class option
+|trans|. 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}{trans}
+  Create a version that uses the |trans| 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| trans: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 transparencies version, insert
+the text only on slides 2,~3, and~5.'' If no special mode specification is
+given for |trans| mode, 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| trans:0>{Not shown on transparancies.}
+\end{verbatim}
+Since there is no zeroth slide, the text is not shown. Likewise,
+\verb!\alert<3| trans:0>{Text}! will not alert the text on a
+transparancy.
+
+You can also use a mode specification for the overlay specification
+of the |{frame}| environment as in the following example.
+\begin{verbatim}
+\begin{frame}<1-| trans:0>
+  Text...
+\end{frame}
+\end{verbatim}
+This causes the frame to be suppressed in the transparancies
+version. Also, you can restrict the presentation such that only
+specific slides of the frame are shown on the handout:
+\begin{verbatim}
+\begin{frame}<1-| trans:4-5>
+  Text...
+\end{frame}
+\end{verbatim}
+
+It is also possible to give only an alternate overlay
+specification. For example, |\alert<trans:0>{...}| causes the
+text to be always hilighted during the presentation, but never on the
+transparancies version. Likewise, |\frame<trans: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. 
+
+
+
+
+
+%%% Local Variables: 
+%%% mode: latex
+%%% TeX-master: "beameruserguide"
+%%% End: