User blog comment:Sannse/Sneak Peek at the New Look - Themes/@comment-83.254.212.197-20100918150253/@comment-824313-20100919051700

Like I've said before, you might be able to do anything with CSS: position: fixed; overflow:visible; left: 0px; right: 90%; width: 10%; }
 * 1) sidebar {

position: fixed; overflow:visible; left: 10%; right: 0px; width: 90%; }
 * 1) wikia_page {

Please note, it might not be that simple, and Wikia would look a lot better if all wikis were consistent.

As for showing/hiding the sidebar, in Firefox, there is a toggling macro addon called Customize your web which might work for Oasis. You also might be able to toggle it with custom JavaScript, which I am pretty much clueless about. There also might be a way to implement the Show/Hide features already used. See Wikipedia's page on SHOW/HIDE.