Beamer：如何去除标题下的阴影

Question

我想删除标题下的阴影（渐变褪色）。

\documentclass{beamer}
\usetheme{Frankfurt}
\usecolortheme{dove}
\setbeamercolor{section in head/foot}{fg=white, bg=black}
\begin{document}
\section{Introduction}      
\begin{frame}{Frame}
\end{frame}
\end{document}

Answer 1

只需添加\setbeamertemplate{frametitle}[default][colsep=-4bp,rounded=false,shadow=false]到序言中。见下文。

\documentclass{beamer}
\usetheme{Frankfurt}
\usecolortheme{dove}
\setbeamercolor{section in head/foot}{fg=white, bg=black}
\setbeamertemplate{frametitle}[default][colsep=-4bp,rounded=false,shadow=false]
\begin{document}
\title{Testing}
\author{myself}
\begin{frame}[plain]
\titlepage
\end{frame}
\section{Introduction}      
\begin{frame}{Frame}
\end{frame}
\end{document}