the added functionality is that i have two discreet keys set up to do these two different things with. let’s say i’m auditioning a piece of music and spot a mistake, i’ll use the respective keycommand to stop and not return; then zoom in and work on the arrange from there. if i’m sound-designing for instance, i’ll usually want to always start auditioning from the same spot. then i’ll be using the other key. (i could use markers to some extent for this, but this is faster…)