Extending a Selection to an Adjacent Track
To extend a selection to an adjacent track:
1. With the Selector or Time Grabber tool, make a selection.
2. Do one of the following:

Press Control+Shift+P (Mac) or Start+Shift+P (Windows) to extend the selection to the previous track.

Press Control+Shift+Semicolon (;) (Mac) or Start+Shift+Semicolon (;) (Windows) to extend the selection to the next track.
In either instance, the original Edit selection remains selected.