For when you want to clear all the steps out of a certain pad/note. Currently, it appears that the only way to do so, is to clear the whole patter. But let's say you laid down a great kick/snare pattern - for 2 measures (64 notes) - and now you're playing in the hihat pattern.......and you put in a bunch of hihat notes. But then you don't like what you just played for the hithats, and want to re-record just that part. But now, you have to go through and manually delete all the steps - which is a pain in the ass, and completely unreasonable to do in a live setting. Made worse the longer your pattern is.