KOMA-Script: change font of sectioning headings to serif

Question

How to change the default KOMA-Script font that is used for chapter/section headings etc. to the Computer Modern font that is used in text body?

Answer 1

Use \setkomafont or \addtokomafont. See section 3.6 of the KOMA-Script manual for details.

\documentclass{scrbook}

% Variant A: Default plus roman (i.e., still bold)
\addtokomafont{disposition}{\rmfamily}

% Variant B: Ecactly as in the text body (i.e., not bold)
% \setkomafont{disposition}{\normalfont}

\begin{document}

\chapter{foo}

\section{bar}

Some text.

\end{document}

Answer 2

\addtokomafont{disposition}{\rmfamily}