Board Thread:Support Requests - Getting Started/@comment-89.211.150.104-20130210201018/@comment-4018164-20130211140733

If you're admin in your wiki, you can do it through your Theme Designer, make sure the "Customize" menu on the left is selected. Then follow those steps: It is also possible to do it using MediaWiki:Wikia.css, but it's not needed.
 * 1) Click the image below the text that says "graphic".
 * 2) Then you'll be able to select a background, or use one from your computer.
 * 3) *If you do, select a file from your computer, and press the "Upload" button.
 * 4) *Make sure the file must be no more than 150KB, so a JPG file with a small compression can do the work.
 * 5) When you're done, press the "Save, I'm done" button.