STEP 1: Put the stretch bar together and make sure they are vertical to each other.
STEP 2: Measure 5 cm. each side and fold them up across the black line marked on the canvas.
STEP 3: Face down the framed and make sure it is in the center of the canvas.
STEP 4: Pull the 5 cm. border up and put a staple tightly in the center with the staple gun.
STEP 5: Turn to the opposite side, pull up the border and make sure it is tight enough and put a staple.
STEP 6: Do the same process to the left sides. All we need to stretch very tough.
STEP 7: Go to the first side, put the staple on the right and left side about 2 inched apart.
STEP 8: Pull up the side at the corner tightly.
STEP 9: Leave a staple at least 2 inches away from the edges.
STEP 10: Fold the canvas as the picture showed.
STEP 11: Pull the canvas back and onto the bottom side and make sure it is tight enough.
STEP 12: Put a staple on the corner. Do the same process to the left corners.