Board Thread:Support Requests - Designing Your Wikia/@comment-26704643-20150805075149/@comment-24930713-20150809013400

If you're an admin you can click a button at the bottom that says "Admin." It'll take you to the admin dashboard, the first icon should be the theme designer. After you've clicked it, there are three options: Theme, Customize, and Wordmark. Click customize, then choose "graphic." In my opinion, here's where it gets difficult. The image has to be 300 or below kb, so I recommend using the jpg format. Also depending on the size, there may or may not be a split in the middle of your graphic; depending on your theme and the transparency of your content section, it may not be noticable.