113

So we have something like:

\documentclass{article}
\setcounter{secnumdepth}{2}
\setcounter{tocdepth}{2}
\usepackage{amsmath}

\begin{document}

\tableofcontents

\section{Brushless Motor Fundamentals}
\subsection{Brushless Motor Operation}
\subsubsection{DC Motor Operation}
Torque is generated in DC motors from the magnetic force,
also known as the Lorentz force, which is produced when an
electric current is passed through a coil in a magnetic field.
This force is given by $F=q[E+(v\times B)]$,
where $F$ is the force perpendicular to the coil,
$E$ is the electric field in the coil, $B$ is the magnetic field,
and $v$ is the velocity of the charged particles in the coil.
From mechanics, torque is $\tau=F\times r$.

\section{Brushless Motor Fundamentals 2}
\subsection{Brushless Motor Operation}
\subsubsection{DC Motor Operation 2}
If the electrical force is ignored and the remaining magnetic force is used,
with the assumption that $v$ is perpendicular to $B$,
we find that $\tau=qvBrsin\theta$.

\end{document}

How to show subsubsections and paragraphs in TOC?

strpeter
  • 5,215
Kabumbus
  • 1,805

1 Answers1

167

Increase the value of tocdepth and secnumdepth. The tocdepth value determines to which level the sectioning commands are printed in the ToC (they are always included in the .toc file but ignored otherwise). The secnumdepth value determines up to what level the sectioning titles are numbered. They are LaTeX counters and you can set them using \setcounter.

The sectioning levels have the following numbers:

-1 part
0 chapter     
1 section       
2 subsection  
3 subsubsection
4 paragraph
5 subparagraph

In the document class article, \chapter doesn't exist and 0 stands for \part instead.

Example:

\documentclass{article}
\setcounter{tocdepth}{4}
\setcounter{secnumdepth}{4}
\begin{document}
\tableofcontents

\section{section}
\subsection{subsection}
\subsubsection{subsubsection}
\paragraph{paragraph}
\end{document}
Abu Shoeb
  • 117
Thorsten
  • 12,872
  • 2
    Oddly enough, in scrreprt this doesn't seem to work properly unless you set secnumdepth first. – Egor Hans Jan 24 '20 at 10:22
  • For anyone interested to locate the definition on levels of headings, for builtin document classes, it is introduced in section "7.2.7 Lower level headings" in classes.pdf (accessible by command line texdoc classes or on CTAN), defined with the 2nd argument of the environment command @startsection . – Quar Mar 03 '21 at 16:51
  • @EgorHans This seems not to be correct. tocdepth (= showing an entry in the ToC) and secnumdepth (= numbering the heading and therefore also ToC entry) are independent in scrreprt like they are in report. BTW: With scrreprt you even don't need to know the absolute levels numbers (and maybe should not use them, because they are configurable). You can just use \setcounter{tocdepth}{\paragraphtocdepth} and \setcounter{secnumdepth}{\paragraphnumdepth}. – cabohah Aug 31 '23 at 07:43
  • Be careful, you are mixing secnumdepth and tocdepth. 0 stands for \part only in secnumdepth. \l@part uses \ifnum \c@tocdepth >-2\relax and therefore setting tocdepth to -1 still shows the parts in the the ToC. So the tocdepth of part is -1. – cabohah Aug 31 '23 at 07:47
  • @cabohah Maybe the issue you're pointing out (with the depth for a specific level being different between the counters) was the cause of having to set secnumdepth for me. If I ever go back to using that snippet for anything (I'm no longer in a situation where I need to write such documents any time soon), I'll definitely rewrite it to use the respective macros and see if I still need both. – Egor Hans Oct 12 '23 at 16:39