I don't think it's a feature but I was thinking, when you use the Arranger in a track for a certain part of your song, I think it would be great to be able to select that part, so vertically it selects whatever is in the arranger column and then you can add say 'Echo' to that whole vertical section.
I wanted to do this myself on a song, it was only 1 bar but I wanted the whole song, at that exact point, to all have echo applied and I had to go through 5 tracks, one by one, adding it to each one individually. It just popped in to my head to suggest this as a feature. If it is already one then can you tell me how to do this, if not, I'm adding it here as a request.
Maybe others would find it useful and I do think it's a cool feature request, I've not seen this on any other DAW either.