[Tex/LaTex] Lyx Table of Contents not being generated

Question

Here is a minimal working example as exported from Lyx

\documentclass[english]{article}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}

\makeatletter
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% User specified LaTeX commands.
\usepackage{titlesec}
\newcommand{\sectionbreak}{\clearpage}

\makeatother

\usepackage{babel}
\begin{document}

\title{Test}

\author{Me}

\maketitle
\tableofcontents{}

\part*{Part 1}
\section*{Sec 1}
Test
\section*{Sec 2}
Test
\end{document}

I have used a TOC before when using TexWorks etc and know that the compiler has to run several times. How do I get Lyx to generate the TOC?
Thanks

Answer 1

Unnumbered headings (part, section, etc.) are not placed in the table of contents, so you need to use the numbered equivalents instead. In the LaTeX code, the * after \part, \section etc. indicates that it is an unnumbered heading, and the same * is used in LyX.

On the other hand. If you don't want any of the headings to be numbered, but still show up in the ToC, go to Document --> Settings --> Numbering & TOC, and drag the Numbering slider all the way to the left. This will hide the number from the various headings.

In LaTeX terms, this adds \setcounter{secnumdepth}{-2} to the preamble, which turns off numbering for all sectioning levels. (Actually, -1 would have been sufficient I think, don't know why LyX makes it -2.) The different levels of headings are numbered from -1 (part) to 5 (subparagraph), and the secnumdepth counter determines which levels will have numbers displayed. Similarly there is a tocdepth counter which determines which levels are placed in the ToC. In LyX, the value of this counter is also adjusted in Numbering & TOC in the document settings.

A small LaTeX code example:

\documentclass{article}
\begin{document}
\tableofcontents

\section*{A}
Unnumbered, not in ToC.

\section{B}
Numbered, in ToC.

\setcounter{secnumdepth}{0}
\section{C}

Numbered, but number hidden, in ToC.
\end{document}