Editing : Edit Modes and Tools : Using the Scrubber Tool : Scrub/Shuttle Mode

Scrub/Shuttle Mode
When scrubbing normally, you can scrub at normal playback speeds or slower. Scrub/Shuttle mode, however, lets you scrub at several times normal speed, which is helpful in playing through large ranges and locating material.
To scrub in Shuttle mode (at several times normal speed):
1 Select the Scrubber tool.
2 While pressing Alt (Windows) or Option (Mac), drag within the track—left for reverse, right for forward. The Fast Forward and Rewind buttons in the Transport window engage.
The distance and speed dragged determine the speed for the scrubbed audio.