Thread:Firefly233/@comment-171752-20130410191821

Hi Firefly. Only admins can upload a wiki logo (as well as other changes to the wiki's appearance). If you want to become an admin on a wiki, you can submit a request at Adoption:Requests. Be sure to read the guidelines first.

If you do become an admin, the theme designer is the tool you'll use to customize the appearance of the wiki, including adding a logo. You can read (and watch a video) about how the theme designer works at Help:Theme designer. 