\documentclass%:default:classopt:[%{beamer} %:default:pkgs:% %\usetheme{Malmoe} \usetheme{AnnArbor} %\usecolortheme{seahorse} %\usecolortheme{rose} %\usecolortheme{orchid} % You must set \author before \begin{document}, because beamer uses it to set % the author field in PDF, which fails if \author is set after \begin{document}. % But pay attention, babel is not active here so "o (and the like) do not work. \author{your name} \begin{document} \title{The title of your presentation} \subtitle{Maybe, a subtitle} \date{1970-01-01} \begin{frame} \titlepage \end{frame} \begin{frame} \tableofcontents \end{frame} \section{A proof} \begin{frame} \frametitle{There Is No Largest Prime Number} \framesubtitle{The proof uses \textit{reductio ad absurdum}.} \begin{theorem} There is no largest prime number. \end{theorem} \begin{proof} \begin{enumerate} \item<1-| alert@1> Suppose $p$ were the largest prime number. \item<2-> Let $q$ be the product of the first $p$ numbers. \item<3-> Then $q+1$ is not divisible by any of them. \item<1-> Thus $q+1$ is also prime and greater than $p$.\qedhere \end{enumerate} \end{proof} \end{frame} \end{document}