consider the following MWE:
Code: Select all
\documentclass{article}
\makeatletter
\def\@part[#1]#2{%
\ifnum \c@secnumdepth >\m@ne
\refstepcounter{part}%
\addcontentsline{toc}{part}{\thepart\hspace{1em}#1}%
\else
\addcontentsline{toc}{part}{#1}%
\fi
{\parindent \z@
\interlinepenalty \@M
\normalfont
\ifnum \c@secnumdepth >\m@ne
\Large\bfseries\hfil\partname~\thepart\hfil
\par\nobreak
\fi
\huge \bfseries #2%
\markboth{}{}\par}%
\nobreak
\vskip 3ex
\@afterheading}
\makeatother
\begin{document}
\part{Test}
\end{document}
Thank you in advance!
P.S. The code is taken from this post where I asked a similar question some time ago.