Speaking purely on the rear.
The 1 dot middle moves the hinge pin 1 deg in that direction. Up, down, in or out.
Used for adding or removing toe in/out without changing the anti squat. Or change the anti squat without changing the toe angle. When you use the same pill in the C and D block together you widen or narrow the rear track or increase or decrease the roll centre.
1 dot corner moves it out and up at the same time. For example you can add an additional deg of toe in while adding an extra deg of anti squat.
The .5 versions do the same but move it half the amount.
If you want to add an additional 1 deg of toe in, but only .5 deg of anti squat you need to use the black versions of the pills.
If you are referring to the front of a 4wd they adjust the kickup, track, roll centre and wishbone sweep (I think it’s called sweep. I’m sure someone will correct me if it’s not)
This link may help too.
http://site.petitrc.com/setup/associ...lChart_Mobile/