Editing Help:Section (section)

=== Subsection ===
==== Sub-subsection ====
</syntaxhighlight>

These are sometimes called "levels" based on the number of equal signs before and after, so that the top "Section" above with two equal signs is a "level two" heading, the subsection is a "level three" heading, and the "sub-subsection" is "level four". The maximum level number is six.
{{Shortcut|WP:LEVELONESECTION|WP:MAXLEVEL}}
{{anchor|levelone}} Please <em>do not</em> use a "level one" heading (only one equals sign on each side, i.e.: {{!xt|<nowiki>=Heading=</nowiki>}}). This would cause a section heading as large as the page title at the top of the page. 

Heading names of sections (including subsections) should be unique on a page. Using the same heading more than once on a page causes problems:
* An [[Help:Wikilinks|internal link (wikilink)]] to a section, in the form {{xt|<nowiki>[[Article name#Section heading]]</nowiki>}}, will link only to the first section on the page with that name, which may not be the intended target of the link. See [[WP:Linking#Linking to sections of articles|linking to sections of articles]] for further details.
* When a section with a duplicate name is edited, the edit history and summary will be ambiguous as to which section was edited.
* When saving the page after a section edit, the editor's browser may navigate to the wrong section.