1. Remove any plastic windows from the envelope.
2. Fold a blank sheet of paper the way you intend to fold the completed
letter and place it in the envelope.
3. Draw around the outlines of the two windows.
4. Remove and unfold the paper.
5. Measure the position of each of the outlines from the top and left side
of the page and insert frames or text boxes in those positions.
6. Type the From and To addresses in those frames/text boxes.