I browsed the forums and found some posts concerning selection, but not as clear as these 2 suggestions below:
Simply: it would be really useful if users had the ability to select multiple sections in a pattern/song, the ALT key can be a good companion in this case:
A Track Lock feature would be very handy again when you want to exclude a track from any changes. Suppose that you want to transpose a whole song/pattern, but drum tracks need to remain unchanged. Nothing can be added/deleted from a locked track whether the EDIT is on or off, and they are excluded from selections:
This is also a good idea, muted or turned off tracks could be excluded from selection or change, yet I think a track lock would be the ultimate solution.
+1 yes alt clicking multiple selections would be cool and has been mentioned before by me aswell Same for, being able to create multiple selections over different patterns etc.