For height you loosen the screw perch and either screw the collar up or down depending if you want to raise or lower the car and then reset the setscrews. Before you reset the screws, measure all four corners to determine if you get it correctly done, then reset once you're satisfied.
If you mean the shocks, they have a knob on the shockbody to adjust the dapening. The higher the number the "stiffer" the setting.
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