There's a "?" button on the menu bar upper-left-hand corner of the screen in TS2009 and before - maybe 2010, I don't know - and in TS12 it's in the Driver Options (or whatever that stupid thing is called - all it shows is a button that keeps changing icons on me) menu in the upper-right-hand corner. I wish I knew if there was a hotkey, I'd be using it very often.