#### 25.1.6 `\numberline`

Synopsis:

```\numberline{number}
```

Typeset its argument flush left in a box. This is used in a `\contentsline` command to typeset the section number (see \contentsline).

For example, this line in a .toc file causes the `1` to be typeset flush left.

```\contentsline {subsection}{\numberline {1.1}Motivation}{2}
```

By default, LaTeX typesets the section numbers in a box of length `\@tempdima`. That length is set by the commands `\l@section`, `\l@subsection`, etc. Put section numbers inside a natural-width box with `\renewcommand{\numberline}[1]{#1~}`.

This command is fragile, so you may need to precede it with `\protect` (see \protect). An example is the use of `\protect` in the command `\addcontentsline{toc}{section}{\protect\numberline{}Summary}` to get the `\numberline` into this command in the .toc file: `\contentsline {section}{\numberline {}Summary}{6}` (the page number ‘6’ is automatically added by LaTeX; see \addcontentsline).