G,day to all
I am new to this forum and am not sure to ask this question here or not, but here goes.

I have extensively used Fanuc controlled machines and the most useful control knob is the FEED RATE over ride. It allows for easy tool approach at a rate you can control with the knob.
I see Mach3 has onscreen sliders with the same function.

Can you get a USB hardware switch to control these sliders

Regards