I can enter a single line of g-code by hand.
But I can neither copy from nor paste to that field.
It would be much easier and much less error-prone to past some coordinates I already have in my clipboard into that text-field.
(Or at least into the g-code list.)

MDI is single line only.  If you will go to edit Gcode it will open as a text or notepad and you can copy and paste all you want.

Brett

I tried pasting a single line. That's the point.
Just copy&pasting coordinates to enter that single line without the risk of typos in long coordinates.
MACH3 is often used on touch screens where typing takes a lot of time.
There's no context menu with copy&paste and CTRL+V is already taken up by some other function in the UI (bad choice of cause).

I didn't see any "edit Gcode". Will look for it.