Yeah, set your ride height first with the droop screws when your preload is all the way out, full soft. Then when you’re done, crank up the preload like
@gotnitro said.
Or, the best method is to
measure the shock shaft with your ride height set and use the same length of internal shock limiters. That way the droop screws aren’t taking a butt load of force from cranking them up with a bunch of preload on the springs. After you do that you can use the droop screws to fine tune each corner without them having to endure all of that force.