Adjust reverb in multiple pucks

Hi. I’ve searched for this in the manual, but couldn’t find an answer.
What i want is tu reduce/augment the reverb level of ALL the pucks at the same time. I’ve tried the usual suspects (ALT, SHIFT, combinations, etc.) to no avail. Is that doable?

From memory:
Alt (for all pucks) then right mouse drag left/right.
There’s a little ? Button which shows all the shortcuts.