如何设置文本边距而不与块环境冲突？

Question

我想减少内容文本和页面边缘之间的边距。我遵循以下方法：https://tex.stackexchange.com/questions/354022/modifying-the-margins-of-all-slides-in-beamer，使用\setbeamersize{text margin left=1.40mm, text margin left=1.40mm}。

但是，它会使块不在幻灯片中居中。那么，如何在不影响块设置的情况下设置文本边距呢？ 还有另一种设置文本边距的方法吗？

完整脚本如下：

\documentclass[t]{beamer}

\usetheme{Madrid}
\usecolortheme{beaver}
\usefonttheme{structurebold} 

\usepackage{graphicx} 
\usepackage{booktabs} 
\usepackage{multicol} 

\title[Short title]{Full Title of the Talk} 

\author{JJ XX} 
\institute[UCLA] 
{
University of California \\ 
\medskip
\textit{jx@111.com} 
}
\date{\today} 

% set the text margin
\setbeamersize{text margin left=1.40mm, text margin left=1.40mm}
\settowidth{\leftmargini}{\usebeamertemplate{itemize item}}
\settowidth{\leftmargini}{\usebeamertemplate{enumerate item}}
\addtolength{\leftmargini}{-0.2\labelsep}


\begin{document}

\begin{frame}
\titlepage % Print the title page as the first slide
\end{frame}

\begin{frame}
  \frametitle{Contents}
  \begin{multicols}{2}
    \tableofcontents
  \end{multicols}
\end{frame}

\section{blocka}
\begin{frame}
  \frametitle{blocka}
  \begin{itemize}
  \item First
  \item Second
  \end{itemize}
  \begin{exampleblock}{Introduction to Beamer}
    Beamer is a class of \LaTeX.
  \end{exampleblock}
\end{frame}

\section{blockb}
\begin{frame}
  The second example.
  \frametitle{blockb}
  \begin{block}{Beamer Intro}
    New is New.
  \end{block}
\end{frame}

Answer 1

beamer 块的边距被设计成块内的文本仍然与周围的文本对齐。如果您单独设置边距，这将打破这种对齐方式：

documentclass[t]{beamer}

usetheme{Madrid}
usecolortheme{beaver}
setbeamersize{text margin left=1.40mm, text margin left=1.40mm}


makeatletter
setbeamertemplate{block begin}
{%
  parskipmedskipamount%
  hfillegin{minipage}{.98	extwidth}%
  egin{beamerboxesrounded}[upper=block title,lower=block body,shadow=true]%
    {
aggedrightusebeamerfont*{block title}insertblocktitle}%
    
aggedright%
    usebeamerfont{block body}%
}
setbeamertemplate{block end}
{end{beamerboxesrounded}end{minipage}skipsmallskipamount}
makeatother

egin{document}

egin{frame}
  The second example.
  rametitle{blockb}
  egin{block}{Beamer Intro}
    New is New.
  end{block}
end{frame}

end{document}

---

或者，您可以使用 tcolorbox 内部主题：

documentclass[t]{beamer}

usetheme{Madrid}
usecolortheme{beaver}
setbeamersize{text margin left=1.40mm, text margin left=1.40mm}

useinnertheme{tcolorbox}
	cbset{
  center,
  width=linewidth
}

egin{document}

egin{frame}
  The second example.
  rametitle{blockb}
  egin{block}{Beamer Intro}
    New is New.
  end{block}
end{frame}

end{document}