|
Cut a 2-1/2" square from a piece of cardboard.
Place a ruler from corner to corner on the square. Draw an X on the cardboard. This marks the center of the square. Repeat this X on the back of the frame. Place the cardboard square on the frame, matching the diagonal lines. This centers the cardboard on top of the frame. Trace around the cardboard onto the frame to mark the frame opening. |
|||
|
||||
