Board Thread:Support Requests - Designing Your Wikia/@comment-4224349-20141101014643/@comment-28857013-20141116121955

Entharion wrote: You can, theoretically.

The theme designer keeps track of the most recent 10 changes saved in the preview mode. So it is possible to set up a theme, save it, and then set up another, save that one, etc.

But if you're looking for a way to export themes outside of Wikia, I do not know how. If it's exporting themes outside Wikia, I suppose it can be exported by CSS?