%% 
%%  An UIT Edition example
%% 
%%  Example 04-14-1 on page 104.
%% 
%%  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) 1,2,3

%% ==== 
\PassOptionsToClass{}{beamer}
\documentclass{exabeamer}
\setlength\unitlength{1mm}

%\StartShownPreambleCommands
\usetheme{Hannover}
%\StopShownPreambleCommands

\begin{document}
\begin{frame}{Multi-column mode}{\texttt{columns}, \texttt{column}, \ldots}
\begin{columns}[b] % bottom aligned
 \only<1->{%			starting with overlay 1
  \begin{column}{.4\textwidth}
     \TeX\ is the world's premier markup-based typesetting system,
      and PostScript is the leading language for describing the printed
      page. We describe how they can produce even more beautiful results
      when they work together.
  \end{column}}
  \begin{column}{.2\textwidth}    % starting with overlay 2
   \only<2->{\rule{20mm}{25mm}\put(-13,20){{\color{white}\TeX}}}
  \end{column}
  \only<3>{%			only overlay 3
   \begin{column}{.2\textwidth}{\color{red}\rule{20mm}{40mm}}
       \put(-13,20){\LaTeX}
   \end{column}}
\end{columns}
\end{frame}
\end{document}
