%% 
%%  Ein DANTE-Edition Beispiel
%% 
%%  Beispiel 04-06-7 auf Seite 87.
%% 
%%  Copyright (C) 2010 Voss
%% 
%%  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{beamer}
% graphic converted to gray in book


\usetheme{Berlin}


\begin{document}
\begin{frame}{\texttt{altenv}-Umgebung}
\Huge Dieses
\begin{altenv}<2>{(}{)}{[}{]} Wort \end{altenv}
\only<2>{ist in Overlay 2 in runden Klammern,}
\only<1>{ist in Overlay 1 in eckigen Klammern.}
\end{frame}
\end{document}