Basic Question on Z probing (Carbide Motion)

I would like to start using my probing setup. But I have confusion on metric vs. imperial usage.
I am a bit sad to say that I seem to work always with inches. It’s just because I work with wood all the time.
So here is the confusion:
The command I have seen uses G38.2 Z-15 F10 which uses mm for 15 mm max down at 10 mm/min.

Do you have to have the CM “use millimeters” on the Jog screen?

If the CM is set to use inches, does the probe operation use 15 inches down at 10 inches per min.? (given the same command)

Is the G38.2 command line ALWAYS run in metric?

Or if I choose to use inches, do I need to convert the Z-15 and F10 to equivalent inch units?

Where can I find good clarification on this topic?

Forgot to add - Can we expect that Carbide Motion will eventually have the probing operation more automated?
If so when do you think this might happen?

If you wished, you could toggle the machine into Imperial units, then jog and zero an offset in a imperial, then switch back.

@WillAdams
I’m sorry but that didn’t really answer my questions.

Do you have to have the CM “use millimeters” on the Jog screen?
No, but whatever you leave it selected at is what mode the machine is in
G20 = In
G21 = MM

If the CM is set to use inches, does the probe operation use 15 inches down at 10 inches per min.? (given the same command) Yes

Is the G38.2 command line ALWAYS run in metric?
No
You could prefix it with G21 to put it in metric mode when you probe though.

Or if I choose to use inches, do I need to convert the Z-15 and F10 to equivalent inch units?
Yes

Where can I find good clarification on this topic?
Good question, not sure.
This thread looks interesting though.