副标题 Beamer 演示

Question

我想为我的 Beamer 演示文稿添加一个标题、一个副标题和一个副标题。当然，我对标题和副标题没有问题，但我找不到添加副标题的方法。这是我的 MWE

\documentclass[xcolor=pdftex,t,11pt]{beamer}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%       PRESENTATION INFO        %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\author{My name}
\title{Title}
\subtitle{Subtitle}
\institute{Department of Economics \\My University}
\date{June 2021}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%       SLIDE DEFINITIONS       %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\begin{frame}[plain]
    \titlepage
\end{frame}

\section{Introduction}
\begin{frame}
\frametitle{Introduction}
\begin{itemize}
\item In these lectures we will focus on dynamic panel data models (DPD).\medskip
\end{itemize}
\end{frame}

\end{document}

我尝试添加

\subtitle{Subtitle \\ Sub-Sub-Title}

但它不起作用。有什么想法吗？

Answer 1

我使用过\subtitle{Subtitle\\[1em] Sub-Subtitle}，效果与预期一致。"[...] but it does not work. Any idea?"如果这不是你想要的，你必须更具体一点。

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