From The Linux Foundation

Section Headings

You can create headings by starting and ending a line with up to five equal signs. The heading text is between those markers, separated by a single space.

Headings can be automatically numbered, you can enable or disable this for each page (see `#pragma section-numbers` on HelpOnProcessingInstructions) and for the whole site (see `show_section_numbers` on HelpOnConfiguration).

For more information on the possible markup, see HelpOnEditing.

Example

: = Heading =
: == Subheading ==
: === Level 3 ===
: ==== Level 4 ====
: ===== Level 5 =====

Display

= Heading =

== Subheading ==

=== Level 3 ===

==== Level 4 ====

===== Level 5 =====

Note that proper section numbering requires you to order sections according to a valid structure, i.e. correctly nested. Our sample doesn't do this, so you get a different numbering scheme than you might expect.