I am working in a MIDI file containing multiple regions. Each region contains controller data I would like to delete (e.g. volume). Right now, I only understand how to treat each region separately, one at a time, in the event list. It appears that one can only select-delete event data for one region at a time in this editor. Is there a way to select multiple regions and with one command simultaneously remove volume, sustain, and/or program changes from all selected regions?