%% 
%%  An UIT Edition example
%% 
%%  Example 04-24-1 on page 133.
%% 
%%  Copyright (C) 2012 Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

% Show page(s) 1,2

%% ==== 
\PassOptionsToClass{}{beamer}
\documentclass{exabeamer}
\usepackage[utf8]{inputenc}

%\StartShownPreambleCommands
\usepackage{pgfpages}
\setbeameroption{second mode text on second screen}
%\StopShownPreambleCommands

\begin{document}
\begin{frame}[typeset second,t]{Output on two screens}
An example use of AWK:

\ttfamily\small
\only<second:0>{AWK=`which gawk` || AWK=`which awk`}
\only<second>{ \quad\ldots specification of the AWK program} \pause

\only<second:0>{\$AWK -f undo-bibtex-linebreaks.awk \$MAIN.bbl > \$MAIN.bbl-tmp}
\only<second>{ \quad\ldots transform bbl file} \pause

\only<second:0>{mv \$MAIN.bbl-tmp \$MAIN.bbl}
\only<second>{ \quad\ldots move file back}
\end{frame}
\begin{frame}[typeset second,t]{ Screen output}
\begin{enumerate}
\item<second> shown on the right screen
\item  shown on both screens
\item<second> shown on the right screen
\item<second:0> shown on the left screen
\end{enumerate}
\end{frame}
\end{document}