1. Drag the pen to move it. 2. Use the sliders to adjust the pen's size, coloring, and how see-through it is. 3. The "Black" and "White" buttons will change your pen's color to black or white instantly. 4. The "Re-draw Model?" button will re-draw the model over top of any other drawings. 5. The Up/Down Arrow button will start or stop any drawing. If it points down then your pen isn't drawing, when it points up it is. I might add more models later, but for now there's only 1. Let me know if anything's broken or if you want something added. :-)
Art: Me Coding: Me