Darmstadt 主题的页脚如何显示标题和作者信息的那一栏？

Beamer 里面有不同的主题组合搭配，见：Beamer Theme Matrix，看了下，发现这个并非 Darmstadt 主题默认的搭配效果。

这样的话就需要魔改，在网上搜索 footline beamer，能找到对应的方案如下：Singapore Beamer Theme - add bottom bar with author info。代码简化如下：

\documentclass{beamer}

\usetheme{{Darmstadt}}
\usecolortheme{default}

\setbeamertemplate{navigation symbols}{}

\makeatletter
\setbeamertemplate{footline}{
  \leavevmode%
    \hbox{%
    \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
      \bfseries\usebeamerfont{author in head/foot}%
      \insertshortauthor\hspace{1em}\beamer@ifempty{\insertshortinstitute}{}{(\insertshortinstitute)}
    \end{beamercolorbox}%
    \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
      \bfseries
      \usebeamerfont{title in head/foot}\insertshorttitle
    \end{beamercolorbox}%
    \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
      \bfseries
      \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
      \insertframenumber{} / \inserttotalframenumber\hspace*{2ex} 
    \end{beamercolorbox}}%
  \vskip0pt}
\makeatother

\title[International Trade]{International Trade}
\subtitle{Financial Constraints}
\author[Zeyang Bian]{Zeyang Bian}
\date[\today]{\today}
\institute[Fudan University]{Fudan University}

\begin{document}

\section{Introduction} 
\subsection*{Introduction}
\begin{frame}{Background}
  \begin{itemize}
   \item ABC
   \item ABC
   \item ABC
   \item ABC
  \end{itemize}
\end{frame}

\end{document}

加粗、距离我调过了，颜色你参考 beamercolorbox in the color of a theme 修改，现在这个颜色为主题颜色，跟随主题，效果如下：

QQ截图20191219201008

EthanDeng / mhlatex

Darmstadt 主题的页脚如何显示标题和作者信息的那一栏？ #26