iTunes in Leopard came with three new visualizers: Lathe, Jelly, and Stix. iTunes won't let you do anything with them though, as it grays out the Options menu! So here are some of the key commands I've found to do different things with them:
All visualizers:
- F: display small FPS counter in bottom corner
- I: display album info
Jelly:
- M: Brings up the name of the current "Jelly."
- Up/Down arrows: Cycle through the seven different jellies.
- Up/Down arrows: Cycle between having a single stick, or having two.

