Keyboard Shortcut for Control Room Level?

Is there a keyboard shortcut for Control Room Level in Cubase 9.5?

I’m setting up a Contour Design ShuttleXpress for monitor control in my studio. I’ve got the buttons assigned to monitor selection and want to assign the rotary dial to Control Room Level. So, actually, I need two keyboard shortcuts: one for Control Room Level up; one for Control Room Level down.

Any assistance is appreciated.