A theme provides, via the underlay, an enhanced version of the regular [[style.css]]. This leaves [[local.css]] free for you to further customise. Themes can also provide header and background images. Ikiwiki now comes with several themes contributed by users. You can enable the [[theme_plugin|plugins/theme]] to use any of these: [[!img actiontabs_small.png align=left]] The actiontabs theme, contributed by [[svend]]. This style sheet displays the action list (Edit, RecentChanges, etc.) as tabs.
[[!img blueview_small.png align=left]] The blueview theme, contributed by [[BerndZeimetz]], featuring a panorama photo he took.
[[!img none_small.png align=left]] For completeness, ikiwiki's default anti-theme.