# Entire chapter as subsection

I have a document with 3 chapters. I would like the chapter 2 - Dolor, to appear as a section 1.1 in the table of contents, instead of chapter 2.

I have separate file for each of the chapter and it must stay as a seperate file. How can call chapter as a section from inside chapter 1?

MWE is :

\documentclass[british]{report}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{csquotes}
\usepackage{subfiles}
\usepackage[backend=biber, style=numeric-comp, refsection=chapter]{biblatex}
\addbibresource{biblatex-examples.bib}

\begin{document}
\tableofcontents
\include{Lorem}
\include{Dolor}
\include{Sit}
\end{document}


The contents of chapter 1 (Lorem.tex) are:

\chapter{Lorem}
Ipsum \autocite{sigfridsson} dolor \autocite{geer,worman}
\section{Lorem Section 1}
To err is human
\printbibliography[heading=subbibliography]


The contents of chapter 2 (Dolor.tex) are:

\chapter{Dolor}
Lorem ipsum \autocite{sigfridsson} dolor \autocite{knuth:ct:a,pines}
\printbibliography[heading=subbibliography]


The contents of chapter 3 (Sit.tex) are:

\chapter{Sit}
Lorem ipsum \autocite{sigfridsson} dolor
\autocite{geer,cicero,companion}
\printbibliography[heading=subbibliography]

• Write \section{Dolor} instead of \chapter{Dolor}. – moewe Sep 29 '18 at 11:49
• But that will only help almost: The \include still causes the contents of Dolor to appear on a new page. If you don't want that you should probably use \input. Note that changing from \chapter to \section will also change the behaviour of the refsection. – moewe Sep 29 '18 at 11:56
• Not pretty, but \refstepcounter{section}\addcontentsline{toc}{section}{\protect\numberline{\thesection}Dolor} should do it. – moewe Sep 29 '18 at 12:12
• Where did you put the code? It should replace the \chapter{Dolor}. – moewe Sep 29 '18 at 12:22
• Aha. That would do to much. Just replace the \chapter{Dolor} in the .tex file for the second chapter with the suggested bit of code. That code just fakes the heading entry for the TOC. It does nothing more. – moewe Sep 29 '18 at 12:24

## 1 Answer

If you only want to have a section heading in the TOC, but not in the actual document you need to use a few more low-level commands.

Replace \chapter{Dolor} with \tocsection{Dolor} where \tocsection is defined as below

\documentclass[british]{report}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{csquotes}

\newcommand*{\tocsection}[1]{%
\refstepcounter{section}%
\addcontentsline{toc}{section}{\protect\numberline{\thesection}#1}}

\begin{document}
\tableofcontents

\chapter{Lorem}
lorem ipsum

\section{Ipsum}
lorem ipsum dolor sit amet

\tocsection{Dolor}
sit amet
\end{document}


• hi @moewe, I have encountered a problem in this answer. I see by using this the page header does not get updated. It sticks to the global name (Lorem). However, I would like the page header to get updated to sub-section name (Dolor). Can you please help? – Rouge Dec 3 '18 at 8:57
• @Rouge Can you open a new question with a short example document that reproduces the issue along with a description of what you expect to see instead? – moewe Dec 3 '18 at 9:03
• @Rouge Maybe tex.stackexchange.com/q/35433/35864 can help you already, but the exact details will depend on your class and the setup of your headers/footers. – moewe Dec 3 '18 at 9:06