Map volume control to Logitech R800
I have the Logitech Professional Presenter R800 for keynote.
I dont use button 3 or 4 at all .. but I would like to use them to control the volume.
From my understanding they keys send an F5 and a period "."
How can I map these keys to control volume? or any suggestions to control volume on keynote?
Short of getting a bluetooth keyboard.
MacBook Pro, macOS High Sierra (10.13.3), Keynote