最小工作示例（MWE）

Question

大家好，新年快乐！

第一次在这里发帖，我刚刚有个小问题，一直没法解决。我发布了一个使用 Metropolis 主题的基本 LaTeX 投影机代码的 MWE。*我想（全局地）让进度条周围有一个边框，并指定边框的颜色和厚度（假设是 0.25pt 厚的蓝色边框）。如何实现？

如果有什么我可以澄清的，请告诉我。非常感谢任何愿意考虑我的问题的人。

祝大家 2024 年快乐、健康！

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*具体来说，Overleaf 模板，替换了框架，并对 MWE 代码的第一行和序言的“我的模组”部分进行了细微修改。

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最小工作示例（MWE）

\documentclass[12pt,aspectratio=169,xcolor={svgnames, dvipsnames}]{beamer}

\usetheme[progressbar=frametitle]{metropolis}
\usepackage{appendixnumberbeamer}

\usepackage{booktabs}
\usepackage[scale=2]{ccicons}

\usepackage{pgfplots}
\usepgfplotslibrary{dateplot}

\usepackage{xspace}
\newcommand{\themename}{\textbf{\textsc{metropolis}}\xspace}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% My Mods
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\makeatletter
\setlength{\metropolis@titleseparator@linewidth}{2pt}
\setlength{\metropolis@progressonsectionpage@linewidth}{2pt}
\setlength{\metropolis@progressinheadfoot@linewidth}{2pt}
\makeatother
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



\title{Metropolis -- Modified}
\subtitle{A modern beamer theme}
% \date{\today}
\date{}
\author{Matthias Vogelgesang}
\institute{Center for modern beamer themes}
% \titlegraphic{\hfill\includegraphics[height=1.5cm]{logo.pdf}}


\begin{document}

\maketitle

\begin{frame}{First Frame}
    blah blah blah?
    \begin{itemize}
        \item blah blah blah.
        \item blah blah.
        \item yadda yadda yadda.
    \end{itemize}
\end{frame}

\begin{frame}{Second Frame}
    blah blah!
    \begin{enumerate}
        \item blah blah blah.
        \item blah blah.
        \item blah blah bah.
    \end{enumerate}
\end{frame}

\end{document}

Answer 1

progress bar in section page进度条样式使用 Beamer 模板和中的 TikZ 定义progress bar in head/foot。这些模板的定义可在metropolis文档通过将这些定义复制粘贴到您的 MWE 中并修改 TikZ 代码，我能够在进度条周围获得一个非常简单的边框（2pt 厚度，便于查看）：

\documentclass[12pt,aspectratio=169,xcolor={svgnames, dvipsnames}]{beamer}

\usetheme[progressbar=frametitle]{metropolis}
\usepackage{appendixnumberbeamer}

\usepackage{booktabs}
\usepackage[scale=2]{ccicons}

\usepackage{pgfplots}
\usepgfplotslibrary{dateplot}

\usepackage{xspace}
\newcommand{\themename}{\textbf{\textsc{metropolis}}\xspace}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% My Mods
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\makeatletter
\setlength{\metropolis@titleseparator@linewidth}{2pt}
\setlength{\metropolis@progressonsectionpage@linewidth}{2pt}
\setlength{\metropolis@progressinheadfoot@linewidth}{2pt}

% Redefine `progress bar in head/foot` to add border
\newlength{\metropolis@progressinheadfoot@borderwidth}
\setlength{\metropolis@progressinheadfoot@borderwidth}{2pt}
\setbeamertemplate{progress bar in head/foot}{
  \nointerlineskip
  \setlength{\metropolis@progressinheadfoot}{%
    \paperwidth * \ratio{\insertframenumber pt}{\inserttotalframenumber pt}%
  }%
  \begin{beamercolorbox}[wd=\paperwidth]{progress bar in head/foot}
  \begin{tikzpicture}
    % Add blue progress bar border
    \fill[blue] (0,-\metropolis@progressinheadfoot@borderwidth) rectangle (\paperwidth, \metropolis@progressinheadfoot@linewidth+\metropolis@progressinheadfoot@borderwidth);
    \fill[bg] (\metropolis@progressinheadfoot@borderwidth,0) rectangle (\paperwidth-\metropolis@progressinheadfoot@borderwidth, \metropolis@progressinheadfoot@linewidth);
    \fill[fg] (\metropolis@progressinheadfoot@borderwidth,0) rectangle (\metropolis@progressinheadfoot-\metropolis@progressinheadfoot@borderwidth, \metropolis@progressinheadfoot@linewidth);
  \end{tikzpicture}%
  \end{beamercolorbox}
}

% Redefine `progress bar in section page` to add border
\newlength{\metropolis@progressonsectionpage@borderwidth}
\setlength{\metropolis@progressonsectionpage@borderwidth}{2pt}
\setbeamertemplate{progress bar in section page}{
  \setlength{\metropolis@progressonsectionpage}{%
    \textwidth * \ratio{\insertframenumber pt}{\inserttotalframenumber pt}%
  }%
  \begin{tikzpicture}
    % Add blue progress bar border
    \fill[blue] (0,-\metropolis@progressonsectionpage@borderwidth) rectangle (\textwidth, \metropolis@progressonsectionpage@linewidth+\metropolis@progressonsectionpage@borderwidth);
    \fill[bg] (\metropolis@progressonsectionpage@borderwidth,0) rectangle (\textwidth-\metropolis@progressonsectionpage@borderwidth, \metropolis@progressonsectionpage@linewidth);
    \fill[fg] (\metropolis@progressonsectionpage@borderwidth,0) rectangle (\metropolis@progressonsectionpage-\metropolis@progressonsectionpage@borderwidth, \metropolis@progressonsectionpage@linewidth);
  \end{tikzpicture}%
}

\makeatother
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



\title{Metropolis -- Modified}
\subtitle{A modern beamer theme}
% \date{\today}
\date{}
\author{Matthias Vogelgesang}
\institute{Center for modern beamer themes}
% \titlegraphic{\hfill\includegraphics[height=1.5cm]{logo.pdf}}


\begin{document}

\maketitle

\begin{frame}{First Frame}
    blah blah blah?
    \begin{itemize}
        \item blah blah blah.
        \item blah blah.
        \item yadda yadda yadda.
    \end{itemize}
\end{frame}

\begin{frame}{Second Frame}
    blah blah!
    \begin{enumerate}
        \item blah blah blah.
        \item blah blah.
        \item blah blah bah.
    \end{enumerate}
\end{frame}

\section{Test section}

\begin{frame}{Third Frame}
    blah blah!
    \begin{enumerate}
        \item blah blah blah.
        \item blah blah.
        \item blah blah bah.
    \end{enumerate}
\end{frame}

\end{document}