Have experienced this difficulty with other downloads. With this download, it will not permit
moving backward or forward in the program. So if you wish to focus on a specific effect, you must
watch the entore program until you reach the effect you wish to practice. This is very irritating
and a failure with downloads. It is best to provide the effects on DVD whereby you can move
backward or forward in the program or provide the effect in print whereby you can easily turn pages
to review certain movments.