One-Touch Command/Keystroke/etc. to Fade djay Pro Volume on Mac

Hello All,

Having a real difficult time trying to figure out if there is a way to fade the djay Pro master volume on Mac with a single command/keystroke?

I know we can pause the track, but is there any way to simply fade the master volume with a key command in one touch?

I ask as it is an important part of our music operations at an upcoming event to be able to quickly fade the master volume in djay with one button/command/keystroke/movement/etc.

Any information or assistance to this regard would be greatly appreciated.