Secure the fabric to the headboard on the back with staples along the top, bottom and sides. Space the staples no more than 2 inches apart. Stop securing the fabric 2 inches from the corner.
Turn the headboard right side down with the top edge of the headboard at the top edge of the work surface.
Pull the corner to the right out away from the headboard, keep the fabric tight and staple along the top edge until you reach the end of the top edge. Staple 2 inches below the last staple on the end to secure the bottom edge of the fabric.
Pull the corner as far to the left as you can, keeping the fabric tight. Look at the corner to see whether there are folds or ripples in the fabric. If there are, bring the corner back to the right and pull down and to the left to remove the folds. Secure the corner with staples every inch.
Repeat for the other corners.