[Tex/LaTex] Changing font size of chapter headings the same as that of section

fontsizememoirsectioning

enter image description here

I have a memoir document that has mystyle chapter copied from Modify default memoir chapter style.

How can I change the font size of the chapter to the same as that of section? Or, how I can I change the fontsize of chapters in general?

\documentclass[12pt,oneside]{memoir}

\title{Document}
\author{prosseek}
% }

% https://tex.stackexchange.com/questions/97465/modify-default-memoir-chapter-style
\makeatletter
\newcommand{\fonttitle}{\chaptitlefont}
\makechapterstyle{mystyle}{%
\def\chapterheadstart{\vspace*{\beforechapskip}}
\def\printchaptername{}
\def\printchapternum{}
\def\printchapternonum{}
\def\printchaptertitle##1{\fonttitle \space \fonttitle \thechapter.\space \fonttitle ##1}
\def\afterchaptertitle{\par\nobreak\vskip \afterchapskip}
}
\makeatother

\chapterstyle{mystyle}

\begin{document}

\maketitle
\tableofcontents

\chapter{The Domain Problem and Stakeholders}
\section{First}
abcdef. 

\end{document}

Best Answer

Since you've defined \fonttitle to be the font for your chapters, simply replace

\newcommand{\fonttitle}{\chaptitlefont}

with

\newcommand{\fonttitle}{\secheadstyle}

Note that \chaptitlefont corresponds to \Huge\bfseries while \secheadstyle (the default used in sections) corresponds to \Large\bfseries (see Section 6.9 of memoir manual).

Complete code:

\documentclass[12pt,oneside]{memoir}

\title{Document}
\author{prosseek}
% }

% http://tex.stackexchange.com/questions/97465/modify-default-memoir-chapter-style
\makeatletter
\newcommand{\fonttitle}{\secheadstyle}
\makechapterstyle{mystyle}{%
\def\chapterheadstart{\vspace*{\beforechapskip}}
\def\printchaptername{}
\def\printchapternum{}
\def\printchapternonum{}
\def\printchaptertitle##1{\fonttitle \space \fonttitle \thechapter.\space \fonttitle ##1}
\def\afterchaptertitle{\par\nobreak\vskip \afterchapskip}
}
\makeatother

\chapterstyle{mystyle}

\begin{document}

\maketitle
\tableofcontents

\chapter{The Domain Problem and Stakeholders}
\section{First}
abcdef.

\end{document}

Output:

enter image description here

BTW: all the redundant \fonttitle can be eliminated, you can simply write:

\def\printchaptertitle##1{\fonttitle \space \thechapter.\space ##1}

Moreover, \makeatletter and \makeatother are not needed since the code between them doesn't contain the the character @.

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