How to change the layout of section titles

Question

I put the title of my examples in a single table cell to create a look of half a box around it with the following code

\newtheorem*{example}{\begin{tabular}{r|}example\\\hline\end{tabular}}

How can I do something similar for section titles? I tried:

\makeatletter
\renewcommand\section{\begin{tabular}{r|}\\\hline\end{tabular}}
\makeatother

but this doesn't work.

A minimal working example:

\documentclass[a4paper,11pt]{book}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{array}
\newcolumntype{L}{>{\raggedright\arraybackslash}p{0.5\linewidth}}
\renewcommand{\arraystretch}{1.5}
\renewcommand{\headrulewidth}{0pt}
\setlength\arrayrulewidth{1pt}
\theoremstyle{definition}
\newtheorem*{example}{\begin{tabular}{r|}example\\hline\end{tabular}}
\usepackage{xpatch}
\makeatletter
\xpatchcmd{@thm}{\thm@headpunct{.}}{\thm@headpunct{}}{}{}
\makeatother
\begin{document}
\section*{first}
\begin{example}
content
\end{example}
\end{document}

Perhaps you should start by explaining what your overall end goal with this is. This seens rather strange to me. — daleif, Jun 08 '23 at 12:23
As already said in chat, please add a MWE (a short but compileable test document) to your question. How to customise the section layout heavily depends on your documentclass. — samcarter_is_at_topanswers.xyz, Jun 08 '23 at 13:09
Have you tried the reverse approach, i.e., a single-cell tabular env. into the argument of \section? — Mico, Jun 08 '23 at 13:25
@samcarter_is_at_topanswers.xyz I've added some part of my tex file. — user283579, Jun 08 '23 at 13:30
@user91500 - No \renewcommands. Just, say, \section{\begin{tabular}{|c|} aa \\ bb \end{tabular}}. I must confess that I, like the other commenters, am absolutely clueless as to what you're trying to achieve. Incidentally, the fact that you prefer to refuse to say what it is that you may be trying to achieve doesn't really help your cause. — Mico, Jun 08 '23 at 13:43
How on earth can you have \section directives before \begin{document}?? This makes no sense at all. No wonder we're having major difficulties understanding what you're trying to do... — Mico, Jun 08 '23 at 13:46
Following the comments I suggest to close this one, perhaps even delete it, to avoid using this approach. Doesn‘t sound useful to me. — MS-SPO, Jun 08 '23 at 14:48
I'm voting to reopen this question. It seems clear that the OP tries to change the format of section titles. — samcarter_is_at_topanswers.xyz, Jun 09 '23 at 09:40

score 4 · Accepted Answer · answered Jun 08 '23 at 14:12

You could use the titlesec package to redefine the layout of the section heading:

\documentclass[a4paper,11pt]{book}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{array}
\newcolumntype{L}{>{\raggedright\arraybackslash}p{0.5\linewidth}}
\renewcommand{\arraystretch}{1.5}
%\renewcommand{\headrulewidth}{0pt}
\setlength\arrayrulewidth{1pt}
\theoremstyle{definition}
\newtheorem*{example}{\begin{tabular}{r|}example\\hline\end{tabular}}
\usepackage{xpatch}
\makeatletter
\xpatchcmd{@thm}{\thm@headpunct{.}}{\thm@headpunct{}}{}{}
\makeatother
\usepackage[explicit]{titlesec}
\titleformat{\section}{\bfseries}{\thesection}{.5em}{\begin{tabular}{r|}#1\\hline\end{tabular}}
\begin{document}
\section*{first}
\begin{example}
content
\end{example}
\end{document}

This works properly. Thank you. – user283579 Jun 09 '23 at 09:35 — user283579, Jun 09 '23 at 09:35
@user91500 You're welcome! – samcarter_is_at_topanswers.xyz Jun 09 '23 at 09:36 — samcarter_is_at_topanswers.xyz, Jun 09 '23 at 09:36

How to change the layout of section titles

1 Answers1