删除 Beamer 中调色板标题的水印/阴影

Question

我想从 Beamer 第一页和最后一页的标题面板中删除标题水印/阴影。有人能帮我吗？

\documentclass[10pt, a4paper, serif]{beamer}

\usetheme{Darmstadt}
\usetheme{Warsaw}

\title[November 2019]{Removing the watermark}
\subtitle[]{}
\author[Alexandre Loures]{Alexandre Loures}
\date{November 2019}

\begin{document}

\maketitle

\section{Removing the watermark}

\begin{frame}

\frametitle{}{}

Removing the watermark

\end{frame}

\include{help-thanks}

\end{document}

作为 thanks.tex：

\section{}

\begin{frame}

\centering
Thanks!

\end{frame}

其结果如下：

我想从 Beamer 第一页和最后一页的标题面板中删除标题阴影，如下所示：

提前感谢您的关注！

Answer 1

您可以本地重新定义使用的模板，有关更多示例，请参阅此问答：Beamer 头条新闻。

对于你的情况应该这样做：

\documentclass[10pt, a4paper,serif]{beamer}
\usetheme{Warsaw}

\title[November 2019]{Title: Removing the watermark}
\author[Alexandre Loures]{Alexandre Loures}
\date{November 2019}

\begin{document}

\begingroup
\setbeamertemplate{section in head/foot}{}
\setbeamertemplate{section in head/foot shaded}{}
\begin{frame}
\maketitle
\end{frame}
\endgroup

\section{Section: Removing the watermark}
\begin{frame}
Normal text: Removing the watermark
\end{frame}

% etc. 
\end{document}

---

对于更频繁的使用，我建议定义一个新环境：

\documentclass[10pt,a4paper,serif]{beamer}
\usetheme{Warsaw}

\title[November 2019]{Title: Removing the watermark}
\author[Alexandre Loures]{Alexandre Loures}
\date{November 2019}

\newenvironment{headless}
  {%
    \begingroup
    \setbeamertemplate{section in head/foot}{}
    \setbeamertemplate{section in head/foot shaded}{}
    \begin{frame}
  }{%
    \end{frame}
    \endgroup
  }

\begin{document}

\begin{headless}
\maketitle
\end{headless}

\section{Section: Removing the watermark}
\begin{frame}
Normal text: Removing the watermark
\end{frame}

% etc.
\end{document}

Answer 2

您可能对以下 MWE 中所示的新定义的命令感到满意\hidesectiontitles。 如果要在标题框上使用它，请确保将两个命令都括在一组中{}：

\documentclass[10pt, a4paper]{beamer}

\usetheme{Warsaw}

\usefonttheme{serif}

\title[November 2019]{Removing the watermark}
\subtitle[]{}
\author[Alexandre Loures]{Alexandre Loures}
\date{November 2019}


\newcommand{\hidesectiontitles}{\setbeamercolor{section in head/foot}{fg=black}
                                \setbeamercolor{subsection in head/foot}{fg=black}
                                \setbeamercolor{author in head/foot}{parent=palette quaternary}
                                \setbeamercolor{title in head/foot}{parent=palette primary}}

\begin{document}

{\hidesectiontitles
\maketitle}

\section{Removing the watermark}
\begin{frame}
\frametitle{}{}
Removing the watermark
\end{frame}

\hidesectiontitles
\begin{frame}
\centering
Thanks!
\end{frame}

\end{document}

---

可能不是最优雅的解决方案，但通过\pgfdeclareverticalshading如以下示例所示重新定义，您可以删除演示文稿所有帧上 frametitle 下的阴影。

\documentclass[10pt, a4paper]{beamer}

\usetheme{Warsaw}

\AtBeginDocument{
  \pgfdeclareverticalshading{beamer@topshade}{\paperwidth}{%
    color(0pt)=(bg);
    color(0pt)=(bg)}
}

\usefonttheme{serif}

\title[November 2019]{Removing the watermark}
\subtitle[]{}
\author[Alexandre Loures]{Alexandre Loures}
\date{November 2019}

\begin{document}

\maketitle

\section{Removing the watermark}

\begin{frame}
\frametitle{}{}
Removing the watermark
\end{frame}

\section{}

\begin{frame}
\centering
Thanks!
\end{frame}

\end{document}