cmd+z or ctrl+z are useful toggles. As SndCastie says, they don't work on every action you've taken (poses are particularly hard to undo). Restore brings you back to the last saved place, and is useful if you just need to restore the cameras without messing with your lights, or restoring the figure without changing your cameras. The "memory dots" are very useful, especially if you remember that there are 3 types of dot there. However, basically, I like to save off under other names. I've had too many flaky computers over the years. Even if the app doesn't crash, the beastie probably will, and who likes a corrupted file? Carolly