adding html content to background

[flowers22888]

Hi,
anyone knows how can I put some html content in the background? In the forum, the blue margins on the left and right would be the background. Which part of the control panel is related to adding html content to the margins? In this forum, the margin would be the blue section to the left and to the right.

thanks
Jessie

[your24hourstore]

go into stylevar

and look for DOC it has margin size and the background stuff