The EC Track is designed to accept mounts that are installed to a fixed vertical position during initial installation. To move a mount you will need to remove the payload, use an allen wrench to loosen the set screw, adjust the mount on the track, tighten set screw with allen wrench and put the payload back on the mount. IMPORTANT NOTE: Height adjustable arms with vertical travel deliver instant movement up and down. In most cases the built in range of the arms eliminates any requirement to reposition the mount on the wall track. We offer EC-TRACK solutions that feature height adjustable arms on our Combo 2 page. You may also purchase a Heavy Duty Wall Track Mount fror the EC-TRACK with almost any SERIES-118 height adjustable arm. For instant vertical height adjustment along a track, you may also review our Leverlift family of products.