Replace Clip - Not Just For Post
This is a command I associate with post-production. I'm sure many people use it in music workflows too but it's not something I've come across many times in this context so I thought I'd use a drum loop as a demonstration.
In this video, I have used separate at transients to split the loop up into its constituent hits but be aware that the snare is a sample which has been copied onto beats 2 and 4 of each bar of the beat. It is the same clip in all four locations, just by dividing a loop up using separate at transients and expecting Pro Tools to identify the snare hits on its own isn't going to work. However, in cases where people are building beats from a limited set of samples, as many do, this technique will work first time.