我想在所有部分中将 parindent 设置为 2mm，在所有子部分中将 parindent 设置为 0mm。有办法吗？
谢谢 Ráď
\documentclass{article}
\begin{document}
\section{Section1}
Lorem ipsum dolor sit amet, consectetur adipiscing elit.Etiam placerat porta massa eu malesuada.
This text has a space before it. Integer egestas venenatis ipsum, et interdum nulla sagittis sed.
\subsection{Subsection1}
Fusce egestas ultricies turpis eget fermentum.
I want this text alligned. Maecenas sed scelerisque arcu.
\end{document}
答案1
段落应该总是缩进（标题后的第一个段落可能例外）或者从不缩进（并且应该在每个段落前面添加一些垂直空间）；第二种样式可用于信件等短篇文件。
混合缩进和非缩进段落会使读者感到困惑；我不建议这样做。此外，2mm 的缩进量太小了。
你可以轻易地做你想做的事。请不要这么做。
\documentclass{article}
\usepackage{indentfirst}
\let\LaTeXsection\section
\let\LaTeXsubsection\subsection
\def\section{\setlength{\parindent}{2mm}\LaTeXsection}
\def\subsection{\setlength{\parindent}{0mm}\LaTeXsubsection}
\begin{document}
\section{Section1}
Lorem ipsum dolor sit amet, consectetur adipiscing elit.Etiam placerat porta massa eu malesuada.
This text has a space before it. Integer egestas venenatis ipsum, et interdum nulla sagittis sed.
\subsection{Subsection1}
Fusce egestas ultricies turpis eget fermentum.
I want this text alligned. Maecenas sed scelerisque arcu.
\section{Section1}
Lorem ipsum dolor sit amet, consectetur adipiscing elit.Etiam placerat porta massa eu malesuada.
This text has a space before it. Integer egestas venenatis ipsum, et interdum nulla sagittis sed.
\subsection{Subsection1}
Fusce egestas ultricies turpis eget fermentum.
I want this text alligned. Maecenas sed scelerisque arcu.
\end{document}
