[Tex/LaTex] Add a rule after chapter title using titlesec


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.

Best Answer

Here's one possible solution using the last optional argument for \titleformat to insert some vertical spacing and the rule:


{\normalfont\huge\bfseries}{\chaptertitlename\ \thechapter}{20pt}{\Huge}[\vspace{2ex}\titlerule]


\chapter{Test Chapter}