Abstract: A system and method for installing drywall and other sheet materials faster, and with seam improvement providing a better fit, durability, and finish. It employs a device having a wide rear stud connecting member and a narrower front retaining member in parallel orientation with one another. A middle rib separates the two members, creating two open-ended tracks extending away from the rib that may be angled relative to one another 180-degrees or less for differing applications, including butt joints, inside corners, and outside corners, with 180-degree angulation employed in butt joints. Stud connecting members preferably have lateral pre-formed fastener holes, and after being mounted to a stud/joist or other structural support, when edge portions of different sheets are inserted into each track, the sheets cover/conceal from view all fasteners used to mount the device. Thus, fewer coats of mud are required in seams, reducing sheet installation labor and material expense.