Intercomp Alignment Gauge

Hey guys, i have an intercomp bubble camber/caster gauge, i understand the process of how to get the caster readings turn wheel 20 degrees level and adjust turn 20 degrees other direction level and thats your caster, but my questions is after that how do you adjust? do you adjust with the wheel still turned? do you straigten it back out? that is the only part the instructions stop after getting the reading? any help in this would be great! i did a search through the forum but couldnt find anything ...help!!