Mark a spot on the wood on either side of the back of the canvas. The two spots should be the same distance from the top of the canvas.
Wrap one end of the picture wire around one of the short screws a few times.
Screw the wrapped screw into the canvas in one of your marked spots.
Run a length of picture wire from the first screw to the spot across from it. Leave a bit of extra wire to wrap around the second screw.
Cut the wire where it intersects the second spot.
Wrap the end of the wire around the second screw. Leave enough wire to create slack when the second screw is in place.
Screw the second screw in place. Ensure that the picture wire is secure.
Choose your spot on the wall.
Hammer a nail into a wall stud on the chosen spot.
Hang the canvas, lowering the picture wire onto the nail.