Editing : Edit Modes and Tools : Numeric Keypad Set to Shuttle

Numeric Keypad Set to Shuttle
(Pro Tools HD and Pro Tools with Complete Production Toolkit Only)
Pro Tools offers another form of shuttling, different from that of Shuttle Lock mode. With the Numeric Keypad mode set to Shuttle, playback of the current Edit selection is triggered by pressing and holding the keys on the numeric keypad—playback stops once the keys are released. Various playback speeds are available in both forward and reverse. In this mode, pre- and post-roll are ignored.
To shuttle with the Numeric Keypad mode set to Shuttle:
1 Choose Setup > Preferences and click the Operation tab.
2 Set the Numeric Keypad mode to Shuttle and click OK.
3 With the Selector tool, click in the track where you want playback to begin. To shuttle on two tracks, Shift-click in a second track.
4 Hold any of the following keys (or key combinations) on the numeric keypad to trigger playback.
 
5 Press a different key to switch the playback direction or speed. Release to stop.