How to show subsections and subsubsections in TOC?

Question

So we have something like:

\documentclass[english]{article}
\setcounter{secnumdepth}{2}
\setcounter{tocdepth}{2}
\usepackage{amsmath}
\usepackage{tocloft}
\usepackage{xstring}
\usepackage{titlesec}
\usepackage{tocloft}
\usepackage[unicode=true, pdfusetitle,
 bookmarks=true,bookmarksnumbered=false,bookmarksopen=false,
 breaklinks=false,pdfborder={0 0 0},backref=false,colorlinks=false]
 {hyperref}

\makeatletter
\numberwithin{equation}{section}

% we use this for our refernces as well
\AtBeginDocument{\renewcommand{\ref}[1]{\mbox{\autoref{#1}}}}

% redefinition of \equation for convenience
\let\oldequation = \equation
\let\endoldequation = \endequation
\AtBeginDocument{\let\oldlabel = \label}% \AtBeginDocument because hyperref redefines \label
\newcommand{\mynewlabel}[1]{%
  \StrBehind{#1}{eq:}[\Str]% remove "eq:" from labels
  \myequations{\Str}\oldlabel{#1}}
  \renewenvironment{equation}{%
  \oldequation
  \let\label\mynewlabel
}{\endoldequation}

\newcommand{\listequationsname}{List of Equations}
\newlistof{myequations}{equ}{\listequationsname}
\newcommand{\myequations}[1]{%
      \addcontentsline{equ}{myequations}{\protect\numberline{\theequation}#1}}
\setlength{\cftmyequationsnumwidth}{3em}

\makeatother

\begin{document}
\tableofcontents
\listofmyequations

\section{Brushless Motor Fundamentals}
\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 \ref{eq:Force}.
\begin{equation}
  F=q[E+(v\times B)]
  \label{eq:Force}
\end{equation}
where $F$ is the force perpendicular to the coil,
$E$ is the electric field in the coil,
$v$ is the velocity of the charged particles in the coil,
and $B$ is the magnetic field. From mechanics, torque is
\begin{equation}
  \tau=F\times r
  \label{eq:Torque}
\end{equation}
\section{Brushless Motor Fundamentals 2}
\subsubsection{DC Motor Operation 2}
If the electrical force in \ref{eq:Force} is ignored,
and the remaining magnetic force is used in \ref{eq:Torque},
with the assumption that $v$ is perpendicular to $B$, we find that
\begin{equation}
      \tau=qvBrsin\theta
  \label{eq:Magnetic}
\end{equation}

\end{document}

How to show subsubsections and subsubsections of subsubsection in TOC?

Answer 1

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

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}