To let your users decide which skin they can use, you can enable user preferences.
== Offering/Using multiple skins ==
If you have multiple skins available, you can preview and switch between them by [[Special:Preferences|visiting your user preferences]]. Since a given skin can be specified in the querystring, you can even bookmark a certain 'look' for easy comparison with a new theme. e.g. http://freephile.com/wiki/index.php?title=Main_Page&useskin=monobook
== Nice Examples ==