Based on integrated mounting holes, use a tape measure to determine the proper positioning of drawer handles on the front of the picture frame. Mark with pencil or marker, then make two holes into the frame with drill and corresponding drill bit.
Once paint is dry, use caulk gun to add a bead of liquid bonding adhesive approximately 1/4” in from the edge of the opening along the back of the picture frame. Next, place the chalkboard-painted plywood in its permanent position.
With the plywood firmly in place, secure it with screws using a screwdriver. Countersink each screw approximately 1/8” beneath surface of plywood. TIP: Countersinking ensures screw heads won’t come loose and cause the tray to sit unevenly when placed on level surfaces or stratch the surface it sits upon.