Old thread I know, but...
The help file only says how to activate it:
SCRUB TOOL To scrub a single track - Hold down the J key to temporarily enable Scrub mode and drag over the track.
To scrub all displayed tracks - Hold down the J key to temporarily enable Scrib mode and drag in the Time Ruler.
Note: The Scrub tool is invoked by pressing the J key. There is no Scrub tool button in the Control Bar or Tools HUD.
SCRUBBING 1. Hold down the J key to activate the Scrub tool.
2. Click and drag the pointer over an audio track.
Tip: To hear the clips in all audio tracks, drag with the Scrub tool in the horizontal ruler.
My experience: 1.
Holding the J key while dragging the mouse works as advertised. When you're done just release the J key.
2.
Hitting the J key quickly, activates it permanently. To deactivate, select one of the Smart tools.
I've noticed that sometimes hitting the J key again will deactivate it, but this does not work often enough to be reliable. STRANGE!
3. Dragging the mouse in the Time Ruler does NOT work for me at all. Is this feature broken?
Steve