If it has "Adjustomatic" stamped on it, then it should do exactly what Cart posted. As long as no one tampered with the system (I have come across some where people glued it, or drilled into it to mess with the adjusto feature).
If it's not tampered with, then you grab the stem tightly, and grab the bowl, twist the stem clockwise. It feels weird, the first time my friend showed this to me, I thought he was going to just break the pipe, but sure enough, it spins around. You align it to where you want it and then you are still able to unscrew it for cleaning!
Also, if anyone needs some metal tenons aligned, I can do that sort of work. RobJ, pm sent.