How to use the PRISM lens to reduce

1. Glass end of lens facing out.
2. Insert into projector. Have lens almost all the way out.
3. Darken room, turn on Prism projector.
4. Set at 15 inches from surface. Focus should be clear. 80% reduction at this distance.
5. Back away, push lens in, twisting. Further back to enlarge, move lens in. Distance enlarges, lens focuses. This way reduces, or enlarges up to 2 1/4 times.