Board Thread:Support Requests - Designing Your Wiki/@comment-4347751-20130728140607/@comment-4712589-20130728141058

I can't really tell what you are asking for, so this is based on the assuption that you know the element classes but don't know how to change them.

You can style using CSS on the MediaWiki:Common.css page on your wiki. This will direct the CSS changes to your monobook theme but not your oasis theme.