How to define a "final slide" in a beamer template?

Question

I'm trying to define a custom template to mimick our organisation style (defined in pptx). I use the Beamer "title page" template to define my title page, works nicely.

However, I would like to define an equivalent for a "final slide" (like for example a copyright page). I can't find it in the manual, but maybe I missed it.

I now define this page in my custom template, but it requires the user of the template to call a custom command "\insertcopyrightpage". It would be much nicer if the template would enforce this.

Answer 1

To enforce something upon the end of the document you can use \AtEndDocument:

\documentclass{beamer}

\AtEndDocument{\begin{frame}
                  The last slide
               \end{frame}
                }

\begin{document}
\frame{Some slide}
\end{document}

This can be applied to @samcarter's answer as well to obtain the same result:

\documentclass{beamer}

\setbeamertemplate{endpage}{%
    \begin{frame}
        The last slide
    \end{frame}
}

\AtEndDocument{\usebeamertemplate{endpage}}

\begin{document}
\frame{Some slide}
\end{document}

Answer 2

You can define whatever templates you like:

\documentclass{beamer}

\setbeamertemplate{endpage}{%
    \begin{frame}
        bla
    \end{frame}
}

\begin{document}

\frame{text}

\usebeamertemplate{endpage}

\end{document}