[Tex/LaTex] Change chapter command

chapterssectioning

I am using the book class, is there a way to modify the \chapter command to avoid the "Chapter #" above the chapter name and keeping it numbered? Normally I get, for example

Chapter 2

The flight of the Bumblebee

But I would like only

The flight of the Bumblebee

Best Answer

One possibility using the titlesec package:

\documentclass{book}
\usepackage{titlesec}
\usepackage{lipsum}% just to generate text for the example

\titleformat{\chapter}[display]
  {\normalfont\bfseries}{}{0pt}{\Huge}
\titlespacing*{\chapter}
  {0pt}{20pt}{40pt}

\begin{document}

\chapter{The flight of the Bumblebee}
\lipsum[4]

\end{document}

enter image description here

Without packages, one can redefine \@makechapterhead as implemented in book.cls:

\documentclass{book}
\usepackage{lipsum}% just to generate text for the example

\makeatletter
\def\@makechapterhead#1{%
  \vspace*{20\p@}%
  {\parindent \z@ \raggedright \normalfont
    \interlinepenalty\@M
    \Huge \bfseries #1\par\nobreak
    \vskip 40\p@
  }}
\makeatother

\begin{document}

\chapter{The flight of the Bumblebee}
\lipsum[4]

\end{document}

In the previous example I decreased some vertical space before the title; if one doesn't want this, one can simply (as Mico suggests in his comment) \let \@makechapterhead (controlling formatting for headings for numbered chapters) to be \@makeschapterhead (controlling formatting for headings for numbered chapters):

\documentclass{book}
\usepackage{lipsum}% just to generate text for the example

\makeatletter
\let\@makechapterhead\@makeschapterhead
\makeatother

\begin{document}

\chapter{The flight of the Bumblebee}
\lipsum[4]

\end{document}
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