Ah yes. You are using the same theme as me. OK. Here’s how you do it. If you go to “Customize” from your dashboard you will get to the workspace for making changes. Click on the “theme” header and select “Use Custom HTML”. This will give you all the magic code that you can mostly ignore. However, scroll down about one click and you will see this chunk of code:
body {
background: {color:Background} url(’/themes/4/bg.gif’);
margin: 0px 0px 50px 60px;
font: Normal 13px Arial, Helvetica, sans-serif;
color: {color:Text};
To change the background image, you need to replace ”/themes/4/bg.gif” with the URL for your actual graphic. For example, I uploaded a little pattern to the free TinyPic.com site and this is the URL for that pic:
http://i44.tinypic.com/25rfdxl.jpg
Try it for an example by copying and pasting the above URL and replacing ’/themes/4/bg.gif’ with ‘http://i44.tinypic.com/25rfdxl.jpg’ but change ONLY that. Be sure not to delete any additional characters. Save the theme and then preview it and you should see a blue pattern now. You can do this with any graphic you want to put there.