The following topics include information about the style and language settings in vBulletin, as well as a complete style reference covering templates, CSS, and style variables.
Note:
To modify the look and feel of your vBulletin forums, you must have a basic understanding of XHTML 1.0 and CSS 1.0. You can learn the basics of these markup languages on W3schools.com. You can get many of your specific questions answered on the vBulletin community forums.