答案1
对于 beamer v3.70 或更新版本,您可以将引文添加到date
模板中:
\documentclass{beamer}
\usetheme{moloch}% modern fork of the metropolis theme
\author{Author}
\title{Title}
\addtobeamertemplate{date}{}{\par\scriptsize\vskip1cm\hfill\parbox{3cm}{\raggedright some quote to be shown here\par \raggedleft Famous person}}
\begin{document}
\maketitle
\end{document}