sometimes you are tweaking a sample until you find that sweet spot you like
you move to the next pattern, without changing the part you are in
you move any parameter and boom, goodbye to the sweet spot in your previous pattern
a great feature would be to be able to “freeze” a parameter on a pattern
if you want to make sure for example the pitch stays where it is, you can plock the pitch of every note on that pattern, but that is tedious
it would be nice to be able to tell the OT : plock this pitch (or any parameter) to every note on this pattern, so you can copy it to the next pattern while staying in the same part, erase all the plocks and start fiddling safely, knowing the previous pattern was plocked