beamernavigation
I'm going to use beamer-LaTeX give a very long presentation (~10 hours), actually a thorough synopsis of a uni course.
I need structure, so I'd like to use sections and subsections, but if I let appear them all, the right column will be quite full (I like to use the Goettingen, but Bergen or Hannover would be fine as well). Is there a way I can force the subsections of section 1, 3, 4 etc. disappear from the right column when I'm currently discussing section 2?
One possibility is to use array environments with columns of type p{<length>}, instead of bmatrix:
\documentclass{beamer}
\usepackage{array}
\begin{document}
\begin{frame}{Row-echelon form}
Reduce the following matrix to row-echelon form.
\[
\left[
\begin{array}{*{4}{>{\raggedleft\arraybackslash$}p{1.3em}<{$}}}
2 & 1 & -1 & 3 \\
1 & -1 & 2 & 1 \\
-4 & 6 & -7 & 1 \\
2 & 0 & 1 & 3
\end{array}
\right]
\onslide<2->
\to
\left[
\begin{array}{*{4}{>{\raggedleft\arraybackslash$}p{1,3em}<{$}}}
1 & -1 & 2 & 1 \\
\alt<2>{2}{0} & \alt<2>{1}{3} & \alt<2>{-1}{-5} & \alt<2>{3}{1} \\
\alt<2-3>{-4}{0} & \alt<2-3>{6}{2} & \alt<2-3>{-7}{1} & \alt<2-3>{1}{5} \\
\alt<2-4>{2}{0} & \alt<2-4>{0}{2} & \alt<2-4>{1}{-3} & \alt<2-4>{3}{1}
\end{array}
\right]
\]
\action<5>{}
\end{frame}
\end{document}
The figure environment appears to be serving no purpose in your example, so you could simply delete it, however you can use \flushleft to override the default centering in figure if you need to.
\documentclass{beamer}
\begin{document}
\begin{frame}
\begin{columns}[t]
\begin{column}{.5\textwidth}
XXX
\begin{figure}
YYY
\end{figure}
\begin{figure}\flushleft
ZZZ
\end{figure}
\end{column}
\begin{column}{.5\textwidth}
XXX
\end{column}
\end{columns}
\end{frame}
\end{document}
Best Answer
Luckily the
Goettingentheme has a build-in option to hide subsections of other sections: