Board Thread:Support Requests - Designing Your Wikia/@comment-26063505-20150728184556/@comment-26079046-20150728191227

I'm not positive but I think usually you have to be an admin to make those changes. There's a box near the top right of your screen that says "Contribute." If you click on the little down arrow at the right of the box, you should see different options. If one of them is "Edit this page," you may be able to make changes. If you don't see that option, you probaby can't make changes. If you do see the option, you'll see several things you can do. The background and layout you want may be there.

If they aren't there you could also either click edit or view (whichever option you have) on the Wikia you want to imitate, then copy and paste its code into yours while making changes you want to images and text. The images will probably not be copied to your site; you'll have to right click and save them individually.

Keep in mind, though, that Wikia's license (and the law) requires giving credit to your source.