Changing the chapter font size does effect the toc font size - why?

Question

i'm new to latex and i'm wondering why the toc font size does change when i change the chapter font size.

For example. what i do is:

\chapter{\Large{This is my chapter}}

and this part of code does effect the font size of this chapter in my toc. But why? How can i change the chapter font size but not the font size of this chapter in my toc?

(btw: sorry for my bad english)

Hope someone can help. Thanks guys!

Just out of curiosity: Why are you changing the font size of the chapter header in this way? — Mico, Jul 17 '17 at 15:50
Because the argument of \chapter is also used for the ToC entry or the running head. — Schweinebacke, Jul 17 '17 at 15:53
Also related: Changing font size of chapter title without changing table of content font size, Format chapter's heading — Schweinebacke, Jul 17 '17 at 15:57
@Mico The related link doesn't fit to my problem because all i wanna do is just change the size of one specific chapter and not all of them. I want to change it because it has a large title and the style of it looks completly different compared to the other chapter titles. That's why i want to change the size of it. If i change the size to "Large" it fits perfect but the toc style will change also. — mtzE, Jul 18 '17 at 11:26
@mtzE - In that case, simply change \chapter{\Large{This is my chapter}} to \chapter[This is my chapter]{\Large This is my chapter}. By the way, do note that \Large is a "switch". It does not, repeat not take an argument. — Mico, Jul 18 '17 at 11:33

José Carlos Santos · Answer 1 · 2017-07-17T16:03:39.763

2

I suggest that you use the titlesec package for this purpose. More instance, you can do something like:

\documentclass{book}
\usepackage{titlesec}
\titleformat{\chapter}[display]
  {\Large\bfseries}{\LARGE\thechapter}{1ex}
  {\vspace{2ex}}
\begin{document}
\tableofcontents
\chapter{Introduction}
\end{document}

edited Jul 17 '17 at 16:03

answered Jul 17 '17 at 15:52

José Carlos Santos

4,803

Could you please elaborate on this? It is usually helpful to include some code that solves the OP's issue. – TeXnician Jul 17 '17 at 15:53
@TeXnician Done. – José Carlos Santos Jul 17 '17 at 16:04

score 1 · Answer 2 · answered Jul 17 '17 at 15:52

1

The reason for this behaviour is that proceeding this way, Large is written to the .toc file, that \tableofcontents reads.

If you're using a standard class that with titlesec and just write in your preamble:

\usepackage{title}
\titleformat*{\chapter}{\Large}

answered Jul 17 '17 at 15:52

Bernard

271,350

how do i change the font size of only one specific chapter title? I don't want to change all of them – mtzE Jul 18 '17 at 11:28
You can use \titleformat* in the document body. To make it local, enclose the command and the chapter within a \begingroup … \endgroup. – Bernard Jul 18 '17 at 11:40
Thanks Bernard! But @Mico solved my problem in a comment above :) – mtzE Jul 18 '17 at 11:41

Changing the chapter font size does effect the toc font size - why?

2 Answers2