Formatting of chapter title in table of content and in document

Question

I am facing a specific requirement for the format of the table of contents.

I am using the book class. Rather than 1 Introduction # in the table of contents, the requirement is Chapter 1: Introduction # (in which # is the page number).

In the text, rather than Chapter 1 (new line) Introduction the requirement is Chapter 1: Introduction.

What is the simplest way to achieve this?

\documentclass{book}
\usepackage{blindtext}
\begin{document}
\frontmatter
\tableofcontents
\mainmatter
\chapter{Introduction}
\section{My subsection title}
\blindtext[1]
\end{document}

If your title is longer than one line, do you want hanging indentation? — John Kormylo, Oct 22 '20 at 16:56

Luis Turcio · Answer 1 · 2020-10-22T19:09:02.097

Since you are using book class the following will do the trick:

\documentclass{book}
\usepackage{titlesec}% <-- to change chapter, section,... style
\usepackage[titles]{tocloft}% <-- changes to ToC
\usepackage{blindtext}
%rename \thechapter to easy display in ToC
\renewcommand{\cftchappresnum}{Chapter }
%punctuation for chapters in ToC
\renewcommand{\cftchapaftersnum}{:}
%Indentation for chapters in ToC
%separation between the colon and "Introduction" is given in the second argument. The indentation for the whole line is given in the first argument
\cftsetindents{chapter}{0ex}{13.5ex}
%Definition of the new chapter style
\titleformat{\chapter}[hang]{\huge}{Chapter \thechapter :}{1ex}{}
%not sure if sections, subsections, etc. need an specific format
%this for example will change the output of sections
%\titleformat%
%{\section} %<-- command, this will modify section
%[hang] %<-- shape, for section it would be hang too
%{\Large\bfseries} %<-- format
%{\thesection} %<-- label, the number before the actual section name
%{1ex} %<-- horizontal separation between label and title
%{} %<-- code preceding the title body
%[after code] %<-- code following the title body
\begin{document}
\frontmatter
\tableofcontents
\mainmatter
\chapter{Introduction}
\section{My subsection title}
\blindtext[1]
\end{document}

to obtain a better indentation for long chapter titles you can see this question

Thanks Luis.. This adds "Chapter" to everything, including sections, subsections, etc. I would need only the chapter title to be modified. The added number is Roman (I,II,III), whereas I am looking for (1,2,3). (I have edited the MWE to by including a section). — Henk, Oct 22 '20 at 17:59
Sorry, I have edited my code to do something closer to your needs — Luis Turcio, Oct 22 '20 at 19:10

John Kormylo · Accepted Answer · 2020-10-23T02:47:09.760

This version does not use additional packages.

\documentclass{book}
\usepackage{blindtext}
\makeatletter
\renewcommand*\l@chapter[2]{%
  \ifnum \c@tocdepth >\m@ne
    \addpenalty{-@highpenalty}%
    \vskip 1.0em @plus\p@
    \setlength@tempdima{1.5em}%
    \begingroup
      \def\numberline##1{\hb@xt@@tempdima{@chapapp~##1:\hfil}}%
      \advance@tempdima by 4.5em
      \parindent \z@ \rightskip @pnumwidth
      \parfillskip -@pnumwidth
      \leavevmode \bfseries
      \advance\leftskip@tempdima
      \hskip -\leftskip
      #1\nobreak\hfil
      \nobreak\hb@xt@@pnumwidth{\hss #2%
                                 \kern-\p@\kern\p@}\par
      \penalty@highpenalty
    \endgroup
  \fi}
\def@makechapterhead#1{%
  \vspace*{50\p@}%
  {\parindent \z@ \raggedright \normalfont
    \ifnum \c@secnumdepth >\m@ne
      \interlinepenalty@M
      \if@mainmatter
        \Huge\bfseries @chapapp\space \thechapter: #1\par\nobreak
        \par\nobreak
        \vskip 20\p@
      \else
        \Huge \bfseries #1\par\nobreak
      \fi
    \fi
    \vskip 40\p@
  }}
\makeatother
\begin{document}
\frontmatter
\tableofcontents
\chapter{Abstract}
\mainmatter
\chapter{Introduction}
\blindtext[1]
\chapter{A very very very very very very very very very long title}
\end{document}

Thanks John. This works! The only thing missing is the ":" in the TOC (Chapter 1: Introduction), but I don't think that will be problematic. — Henk, Oct 22 '20 at 18:03
A more problematic issue is that all frontmatter (Abstract, Abbreviations etc) now has "Chapter" in front of it. — Henk, Oct 22 '20 at 18:39

score 1 · Answer 3 · answered Oct 22 '20 at 17:36

Use the memoir class (a superset of the book and report classes).

% chaptocstyleprob.tex  SE 567907
\documentclass{memoir}
\usepackage{blindtext}
%% styling the chapter titles
\makechapterstyle{yourstyle}{%
  \renewcommand{\afterchapternum}{: }
}
%% styling the chapter ToC entries
\setlength{\cftchapternumwidth}{1.8em}
\renewcommand{\cftchaptername}{Chapter\space}
\renewcommand{\cftchapteraftersnum}{:}
\begin{document}
\chapterstyle{yourstyle} %% use your chapter style
\frontmatter
\tableofcontents

%% or \tableofcontents* if you don't want the ToC listed in the ToC
\mainmatter
\chapter{Introduction}
\blindtext[1]
\setcounter{chapter}{11}
\chapter{Another chapter}
\end{document}

The memoir class provides many methods for changing the appearance of a document. Read the manual (> texdoc memoir) for more information.

Thanks Peter. I am using the book class, and have written a thesis in it. Switching to memoir now will be quite involved, I think. — Henk, Oct 22 '20 at 17:53

Formatting of chapter title in table of content and in document

3 Answers3