Hi Mike,
I learned along time ago with M3: Don't fiddle with the toolpath display when a job is running.
Haven't tried breaking the rule with either this platform or with M4, it is after all my own rule, why would I do such a thing?.
Don't answer that, I can hear you from here! LOL
I have a workaround for the Autoleveller utility that I use which is being cranky under M4. The toolpath takes about 4 hour to run
just one side of the circuit board so I won't be breaking my little rule today.
Craig