You can lock reels to constrain their scrubbing behaviour to a selected clip. If you lock a clip on two different reels, you scrub them in sync. This is helpful when you want to scrub different versions of a clip simultaneously.
To lock a reel to a selected clip:
A light blue border appears around the selected clip, and the clip—if it was collapsed—expands to show all frames.
To scrub clips on different reels in sync:
Although the clips scrub in sync, you can offset their alignment by positioning them relative to each other prior to locking the reels.
To navigate clips on locked reels:
| Do this: | To: | 
|---|---|
| Click   | Go to the next end (to the left) of the clips in the locked set. | 
| Alt-click   | Go to the next transition (to the left) of the clips in the locked set. | 
| Click   | Play the locked set backward. | 
| Click   | Play the locked set forward. | 
| Alt-click   | Go to the next transition (to the right) of the clips in the locked set. | 
| Click   | Go to the next end (to the right) of the clips in the locked set. | 
| Press left arrow | Frame step backward by the specified number of frames (10 by default). See Reels. | 
| Press right arrow | Frame step forward by the specified number of frames (10 by default). See Reels. |