beamerblock
I want to center align the content in block, but it seems that \centering or \begin{center}...\end{center} does not work:
\documentclass[11pt]{beamer}
\begin{document}
\begin{frame}{Introduction}
\begin{block}{}
{\centering
content that i want to center-align
}
\end{block}
\end{frame}
\end{document}
Could anyone help?
This is so, because \insertsectionnumber is defined as (in the file beamerbasesection.sty)
\def\insertsectionnumber{\@arabic\c@section}
And \appendix doesn't change this;
\newcommand<>\appendix{%
\only#1{\part{\appendixname}
\addtocontents{nav}{\protect\headcommand{\protect\beamer@appendixpages{\the\c@page}}}}}
so the counter will appear using arabic representation.
You can change this, redefining \insertsectionnumber in the proper location:
\setcounter{section}{0}
\renewcommand\insertsectionnumber{\Alph{section}}
Perhaps you want to let \appendix do this change:
\documentclass{beamer}
\makeatletter
\renewcommand<>\appendix{%
\setcounter{section}{0}%
\renewcommand\insertsectionnumber{\Alph{section}}%
\only#1{\part{\appendixname}
\addtocontents{nav}{\protect\headcommand{\protect\beamer@appendixpages{\the\c@page}}}}}
\makeatother
\begin{document}
\section{test1}
\begin{frame}{\insertsectionnumber.~\insertsection}
bal bla
\end{frame}
\appendix
\section{test2}
\begin{frame}{\insertsectionnumber.~\insertsection}
bla bla
\end{frame}
\end{document}
If the shortened block is put inside a minipage, you can center it easily
\documentclass{beamer}
\usetheme{Warsaw}
\newenvironment<>{varblock}[2][.9\textwidth]{%
\setlength{\textwidth}{#1}
\begin{actionenv}#3%
\def\insertblocktitle{#2}%
\par%
\usebeamertemplate{block begin}}
{\par%
\usebeamertemplate{block end}%
\end{actionenv}}
\begin{document}
\begin{frame}
\begin{center}
\begin{minipage}{4cm}
\begin{varblock}[4cm]{New block}
Variable width, here 4cm
\end{varblock}
\end{minipage}
\end{center}
\end{frame}
\end{document}
Best Answer
You had a spurious
{}group which meant that\centeringhad gone out of scope before the end of the paragraph, so the paragraph was not centred.