Here are 2 really great videos to watch....I have actually saved these video's to my hard drive and referr back to them alot...the lady is using a Gammill but that doesn't matter, it is showing how to use a pantograph
http://www.youtube.com/watch?v=gXByu_-OJ6I
http://www.youtube.com/watch?v=gXByu_-OJ6I