I read the FAQ topic and still can't seem to find out how to change my theme. I searched up and down for the "look and feel" section in my xanga, but I can't find it anywhere!
Help!

If you're using the new homepage, there's no look and feel. You have to go back to the old homepage, or follow this link:

http://xanga.com/claf/default.asp

Are you using the themes from Xanga itself? If so, once you've chosen a theme that you want and customised it, remember to click 'save'! See the picture below: