# How to change space between (sub)section number and title in memoir class?

I am required to have exactly one space between chapter/section/subsection/etc. number and title in my document.

I am using memoir class (also a requirement).

How do I do that?

In memoir the default is to have Chapter 1 on one line and then Title on a second line; there is no space' between the number and title. If you are using a non-default chapter style you should say so.

For lower level headings there is a quad space (\quad) between the number and title. Use the \setsecnumformat to change this.

\documentclass{memoir}
\setsecnumdepth{subsection}
\begin{document}
\tableofcontents
\chapter{A Chapter}
\section{A section}
\subsection{A subsection}
\setsecnumformat{\csname the#1\endcsname\space}% change the spacing
\section{Another section}
\subsection{Another subsection}
\end{document}


See the section Lower level headings in the manual (> texdoc memoir`) for more information.