Each wiki has a sidebar on the left of the page. Above the "search" box, administrators on each Wikia can customise the sidebar by adding, reordering or editing lines in MediaWiki:Sidebar. The "search", "toolbox", and "wikia" sections cannot be changed this way.
If you look at any page in the D'ni wiki, you see three sections: navigation, community, and language (unless they change their sidebar).
Lines that do not begin with * or ** are discarded. Lines that do begin with ** and do not contain | are presently also discarded, but this might change in newer releases of MediaWiki (to which Wikia might upgrade).
A line that begins with * indicates a section header. Each Wikia starts with a "navigation" section, but it is possible to change that section's name and to add more sections.
A line that begins with ** and contains a | represents a link in the sidebar menu.
In order maintain consistency for users who have set another language in their preferences, MediaWiki:Sidebar should only be edited in the default language of the wiki. This means, you should not edit "MediaWiki:Sidebar/de" unless you explicitly want German speaking users to see a different sidebar from everyone else.
Do not repeat list values
Do not repeat list values in MediaWiki:Sidebar; they will cause duplicate XHTML ids, which are illegal in XHTML.
You also should not name any section "search", "toolbox", or "wikia" because that duplicates the existing sections and also causes CSS problems.