Editing : Editing Clips and Selections : Nudging Clips

Nudging Clips
For more information, see the following topics:
Pro Tools can nudge clips (or MIDI notes) by precise increments with the Plus (+) and Minus (–) keys on the numeric keypad. The amount of the nudge is determined by the value specified in the Nudge Value pop-up menu. The Nudge function can be used in any of the Edit modes.
Nudging can be invaluable for adjusting the “groove” of a musical phrase or a sound effect relative to other elements in the session. Since Pro Tools can nudge material during playback, you can nudge continuously in real time to adjust the timing relationship between tracks.
Nudge can also be used to adjust the placement of automation breakpoints. For more information, see Editing Automation.