On the top of most wikia sites, the banner is almost always the same. You have the Wikia logo, the 'start a wiki' button and all that, with the banner stretching across the screen. It's the same design across nearly all wikia sites, but some, like the Yoshi Wiki have a different design of the Wikia banner. Is there any way I, as a normal Wiki designer and manager, can do this aswell? Can it be edited by anyone, or only chosen wikis?