Does Drum Visibility Agents in the drum editor have a key command?
The mouse-over tool tip shows this as “Drum Visibility Agents.” But if you open the Drum Editor tool bar, its labeled as “Drum Sound Visibility.” And it could very well be labeled something else in the KC list. 
The inconsistencies and cohesiveness of KC’s, Tool Tips, and Tool bar editors hasn’t been updated in years.
Thanks!