This is a tip originally posted on my old blog… by request, I’m moving those posts over to the noisefreak blog.
A pretty widely known shortcut to duplicate a region in protools is to hold down the option key and drag the region to your desired location. However, adding the shift key to the equation will select every track above and below your selection so you can copy to a new location. This is helpful for duplication the chorus of a song or a group shout. This video briefly shows the keys in action.