You can add an avatar or user pic that appears next to your forum topics and comments, as well as a signature that appears under your comments, on your Account page. Just click the Edit tab on the Account page, and you'll see where to add both. The avatar/user pic should be a minimum of 80x80 pixels in size. An ideal size is 200x200. JPEG, PNG and GIF files are accepted. Your signature can contain some HTML code, but no Javascript sigs are allowed since they can cause problems.