[Tex/LaTex] How to display the footnote in the bottom of the slide while using \columns

beamercaptionsfootnotes

I am using \columns in beamer to show two pictures. After I added \footnote{ExampleText} after captions, the ExampleTest just appear in each column. Now I want to show all of the ExampleText in the bottom of the slide instead of each column, how can I do this?

MWE:

\documentclass{beamer}
\usepackage{graphicx}
\begin{document}
 \begin{frame}
\begin{columns}
\begin{column}{.5\textwidth}
\includegraphics{img1}\footnote{f2}
\end{column}
\begin{column}{.5\textwidth}
\includegraphics{img2}\footnote{f1}
\end{column} 
\end{columns}
\end{frame}
\end{document}

Best Answer

You can use \footnotemark, \footnotetext{<text>}; a little example:

\documentclass{beamer}

\begin{document}

\begin{frame}
\begin{columns}
\column{.5\textwidth}
Some text for the first column and a test footnote\footnotemark
\column{.5\textwidth}
Some text for the second column and a test footnote\footnotemark
\end{columns}
\footnotetext[1]{A test footnote in the first column}
\footnotetext[2]{A test footnote in the second column}
\end{frame}

\end{document}

enter image description here

In a comment it has been asked how to use the same footnote text for two footnotes, one in each column; here's a possibility:

\documentclass{beamer}

\begin{document}

\begin{frame}
\begin{columns}
\column{.5\textwidth}
Some text for the first column and a test footnote\footnotemark
\column{.5\textwidth}
Some text for the second column and a test footnote\footnotemark[1]
\end{columns}
\footnotetext{A test footnote for both columns}
\end{frame}

\end{document}

enter image description here

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