I've been experimenting with chapter title formatting using titlesec
but I can't seem to find the proper way to add a rule just below the chapter title. After reading the doc, I found that \titleline
does that, but I'm not sure where in the \titleformat
syntax to place it.
1 Answer
Here's one possible solution using the last optional argument for \titleformat
to insert some vertical spacing and the rule:
\documentclass{book}
\usepackage{titlesec}
\titleformat{\chapter}[display]
{\normalfont\huge\bfseries}{\chaptertitlename\ \thechapter}{20pt}{\Huge}[\vspace{2ex}\titlerule]
\begin{document}
\chapter{Test Chapter}
\end{document}