It really depends on what gun you are talking about. Some have a single pull-weight screw, some have a single adjustment screw for pull length, some have several adjustments for first stage, second stage, weight, lateral/longitudinal positioning, sear height, overtravel, etc.
If you are refering to the 160 in your other post, if it has the later modular trigger it has a pull weight adjustment, an overtravel adjustment and usually a sear engagement height adjustment.