# How to justify section headings left in APA6 document class?

I am using the apa6 document class for an article, but need the section headings to be justified left instead of centered. Is there a way to override this formatting so that section titles are left justified?

• Welcome to TeX.SE! Do you want to submit an paper to a journal asked you to use class apa6? Then do not change the headings to avoid to get your paper not accepted. I'm not sure you are allowed to use apa6 class to publish an article in another journal/paper, are you sure you are allowed to do it? – Mensch Jun 25 at 23:25

You can patch the base \section command

\renewcommand{\section}{\@startsection {section}{1}{\z@}%
{\b@level@one@skip}{\e@level@one@skip}%
{\centering\normalfont\normalsize\bfseries}}


to not use \centering:

\documentclass{apa6}

\usepackage{lipsum}
\usepackage{etoolbox}

\patchcmd{\section}% <cmd>
{\centering}% <search>
{\raggedright}% <replace>
{}{}% <success><failure>

\begin{document}

\section{A section}
\lipsum[1-10]

\end{document}