beamer footnote not showing

Question

I was wondering what's the appropriate way to add a footnote to a LaTeX beamer presentation, because I am trying \footnote and it's not showing the footnote. It shows the number but no footnote.

Answer 1

Here is one way of adding a footnote to a beamer presentation. By means of a minimal working example:

\documentclass{beamer}
\usepackage{lipsum}% http://ctan.org/pkg/lipsum
\usepackage{hanging}% http://ctan.org/pkg/hanging
\setbeamertemplate{footnote}{%
  \hangpara{2em}{1}%
  \makebox[2em][l]{\insertfootnotemark}\footnotesize\insertfootnotetext\par%
}
\begin{document}
\begin{frame}
  \lipsum*[1]\footnote{Here is a footnote}
\end{frame}
\end{document}

See p 131 of the beamer package documentation.

Answer 2

Turning the comment from @user13878 into an answer:

\footnote[frame]{Here is a footnote}

This has the advantage of simplicity and compatibility with \beamertemplatenavigationsymbolsempty.

Answer 3

Further tuning of the comment of @user13878, the [frame] option of \footnote can be set as default option using

\let\oldfootnote\footnote
\renewcommand\footnote[1][]{\oldfootnote[frame,#1]}

In fact I'm not so expert to write the above sentences. I could wrote them by modifying this solution of David Carlisle. Anyway, they worked perfectly with me.

Answer 4

If you are using a package called setspace then footnotes will not show on beamer. Try doing:

\footnote[frame,1]{My footnote}