I have a logitech MX Master 3 and I cannot map the extra buttons to anything in VO. I'm stuck with just a left and right click. How do I go about assigning the extra buttons or get them to trigger RMBUTTON/LMBUTTON?

check the [MOUSE] section in your config.ini, then check wgaf.cfg for LMBUTTON, RMBUTTON, MMBUTTON, MWHEELUP, MWHEELDOWN, ... and any other M* button