beamercolumnsrules
I am using the columns environment with beamer.
\begin{columns}[c]
\begin{column}{0.5\textwidth}
\includegraphics<1>[width=0.35\textwidth]{dictmat-4.png}
\end{column}
\hspace{-50pt}
\begin{column}{0.50\textwidth}
\includegraphics<1>[width=0.35\textwidth]{dictmat-5.png}
\end{column}
\end{columns}
How can I draw a vertical line between two columns (i.e., the two figures?)
You could fix the vertical alignment by using minipages of the same height in the second column. Here's the modified example with a stable left column:
\documentclass{beamer}
\usepackage{calc}
\begin{document}
\begin{frame}\frametitle{Test frame}
\begin{columns}
\column{.5\textwidth}
A figure
\column{.5\textwidth}
\begin{minipage}[c][.6\textheight][c]{\linewidth}
\begin{itemize}
\item Item 1
\item Item 2
\end{itemize}
\end{minipage}
\end{columns}
\end{frame}
\begin{frame}\frametitle{Test frame 2}
\begin{columns}
\column{.5\textwidth}
A figure
\column{.5\textwidth}
\begin{minipage}[c][.6\textheight][c]{\linewidth}
\begin{itemize}
\item Another item 1
\item Another item 2
\item This list is longer
\item Than the previous one
\item was
\end{itemize}
\end{minipage}
\end{columns}
\end{frame}
\end{document}
As far as I know, the only possibility is to interrupt the columns environment, include the wider material end then start a new columns environment (in fact, that's what the author of the poster you linked to does):
\documentclass{beamer}
\usepackage{lipsum}
\begin{document}
\begin{frame}
\begin{columns}[t,totalwidth=\textwidth]
\column{.5\linewidth}
Some material for the first column goes here
\column{.5\linewidth}
Some material for the second column goes here
\end{columns}
\vfill
\includegraphics[width=\textwidth,height=1cm]{cat}
\vfill
\begin{columns}[t,totalwidth=\textwidth]
\column{.5\linewidth}
Some material for the first column goes here
\column{.5\linewidth}
Some material for the second column goes here
\end{columns}
\end{frame}
\end{document}
And here's the code showing one possible approach to have an image spanning two out of three columns. The idea is to have one outer columns environment of width, for example, \textwidth; inside this environment two columns are created; one of them twice as wide as the other one; inside the wider column, the idea from the previous example is used: an inner columns environment is used to produce two columns of equal width; this inner columns environment is then ended to include the image spanning two columns, and finally another inner columns environment is used to hold the final two columns.
\documentclass{beamer}
\usepackage{lipsum}
\begin{document}
\begin{frame}
\begin{columns}[t,totalwidth=\textwidth]
\column{.32\textwidth}
Some material for the first column goes here. Some material for the first column goes here.
Some material for the first column goes here. Some material for the first column goes here.
\hfill
\column{.65\textwidth}
\vspace*{-\baselineskip}
\begin{columns}[t,totalwidth=\textwidth]
\column{.48\textwidth}
Some material for the second column goes here.
\column{.48\textwidth}
Some material for the third column goes here.
\end{columns}
\includegraphics[width=\textwidth,height=2cm]{cat}
\begin{columns}[t,totalwidth=\textwidth]
\column{.48\textwidth}
Some material for the second column goes here.
\column{.48\textwidth}
Some material for the third column goes here.
\end{columns}
\end{columns}
\end{frame}
\end{document}
Best Answer
Try adding a
\vrulebetween the two columns: