Moving to different Hard Drive partition
I now regret having done so, but I partitioned my HD into a Snow Leopard section and a Mountain Lion section in October. The main reason for doing so has now been overcome, so I now only use the Mountain Lion section. Anyway, today I have to go into the Snow Leopard section, but I have forgotten how to do that. The trick is to hold down some key, or keys, while restarting the computer, but I've forgotten which one(s).
iDVD 7.1.1 (1150)