4 Place the chair body onto the cylinder. No mechanical fastening is necessary because this is a taper fit. Now sit in the chair. This will firmly secure the taper fit. @ Tension Control knob Tm } Removed for [seat height lever tension Clarity seat tilt release Control knot = The chair features two Adjustments to customize your chair. Seat Height: The seat should be adjusted so that your feet are comfortably flat on the floor and you feel no pressure under your thighs.