#### 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 `1.1` 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~}` before `\tableofcontents`.

This command is fragile so you may need to precede it with `\protect` (see `\protect`). An example is the use of `\protect` in this command,

````\addcontentsline{toc}{section}{\protect\numberline{}Summary}`
```

to get the `\numberline` into the `\contentsline` command in the .toc file: ```\contentsline {section}{\numberline {}Summary}{6}``` (the page number ‘6’ is automatically added by LaTeX; see `\addcontentsline`).