I was using someones macbook pro and I was able to get to the dashboard by scrolling with 3 fingers. I can't do this on my macbook with os x lion, is there a way or is it only in mountain lion?
Probably you haven't got Dashboard set up as a space. Open System Preferences > Mission Control, and mark Show Dashboard as a space.
If it doesn't work, you have a computer without a Multi-Touch trackpad, so you can't use the gesture
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