答案1
只对一个未编号的章节执行此操作而不是对所有章节执行此操作确实没有意义。无论如何,它在这里。
\documentclass{book}
\usepackage{etoolbox}
\usepackage{showframe} % for showing text block borders
\makeatletter
\newcommand{\differentchapter}[1]{%
\begingroup
\patchcmd{\@makeschapterhead}{50}{20}{}{}%
\patchcmd{\@makeschapterhead}{40}{70}{}{}%
\patchcmd{\@makeschapterhead}{\bfseries}{\centering\bfseries}{}{}%
\chapter*{#1}%
\endgroup
}
\makeatother
\begin{document}
\differentchapter{ETAPA}
this intro
\section{Exp}
this Exp SECTION
\chapter{ETAPA2}
\label{cap:experimental}
this intro
\section{Exp2}
this Exp SECTION
\end{document}