🚀 go-pugleaf

The font depends on which styles you are using...

If you look into rep10.sty, you will eventually find the macro

\def\@makechapterhead#1{ \vspace*{50pt} { \parindent 0pt \raggedright
 \ifnum \c@secnumdepth >\m@ne \huge\bf \@chapapp{} \thechapter \par
 \vskip 20pt \fi \Huge \bf #1\par
 \nobreak \vskip 40pt } }

which tells you that the \Huge font is used for the heading. If you
want to use a smaller font, change the rep10.sty into a style of
your own or redefine the macro in your document (which will make
it exchangeable without also exchanging the new style). But you have
to make all these catcode-things before you can change a macro that
contains a @-sign. Hope this helps,

Erik Wilde (wilde@tik.ethz.ch)
  Swiss Federal Institute of Technology (ETH Zuerich)
  Laboratory of Computer Engineering and Networks (TIK)
  ETH-Zentrum, ETZ G61.2, CH - 8092 Zuerich
  Phone: +41-1-254-7009  Fax: +41-1-254-7160