Originally Posted by
johnwash1
Click on Settings (just under the green banner at the top of this page). Then click on Edit Signature.
More generally, if you want to know how to do something in the forums here, it's useful to know it's not written by eBid, it's the widely used vBulletin system. So if you google, e.g. in this case for 'vbulletin edit signature', you'll usually find appropriate advice.
By the way, nothing to do with being a novice. I don't think it's at all obvious. But it's difficult to think of a way to design a bulletin board to make such things obvious.