\addcontentsline
----------------
`\addcontentsline{file}{sec_unit}{entry}'
The `\addcontentsline' command adds an entry to the specified list
or table where:
* `file' is the extension of the file on which information is to be
written: `toc' (table of contents), `lof' (list of figures), or
`lot' (list of tables).
* `sec_unit' controls the formatting of the entry. It should be one
of the following, depending upon the value of the file argument:
1. `toc' -- the name of the sectional unit, such as part or
subsection.
2. `lof' -- figure
3. `lot' -- table
* `entry' is the text of the entry.