Basic mechanics: how do you actually manipulate upper control arm alignment cams?

Since anyone who really drives these cars wants all the caster they can get the first thing I do it push the two front cams so they push the front of the control arms all the way out & the rear cams so they pull the control arm all the way in.... Then start trading caster for camber... And if it camber is positive you can use washers between the spindle & lower ball joint attachment point.... That will create negative camber without sacrificing caster...