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Deco Aurora Board Installation. Determine tray height from floor. Make a line on the wall at that distance. Mark level line at desired height from floor to bottom of tray. Position bottom edge of tray along the line. Drill holes through tray into wall using the groove at the rear of the tray as a guide. Fasten tray to the wall. Attached accessory tray. Insert color strip into inner channel into what is to be the bottom rail of board. Gently press strip into channel until it snaps into the outer channel. Center the board onto rail. Attach board to wall with screws. Attach board on all remaining sides. Install remaining color strips. Deco Aurora Markerboard by ghent.