From a comment at Slashdot:

Frequently Asked Questions for Etch-A-Sketch Technical Support

Q: My Etch-A-Sketch has all of these funny little lines allover the screen
A: Pick it up and shake it.

Q: How do I turn my Etch-A-Sketch off?
A: Pick it up and shake it.

Q: What's the shortcut for Undo?
A: Pick it up and shake it.

Q: How do I create a New Document window?
A: Pick it up and shake it.

Q: How do I set the background and foreground to the same color?
A: Pick it up and shake it.