I do not understand

[Thomss]

Good day to you all,

The question is very simple, but for me not understandable. 
in the main screen of Mach3, there is a part that shows me where the actual milling point is. (middle top screen)
This correspond to the GCode on the top left side of the screen.
These steps, what is their measurement ? mm, inch, or other.

I thought it where MM,

Thomass,

[Tweakie.CNC]

Hi Thomss,

The X,Y,Z,4 DRO's are in Units.
If you have selected native units as mm then the DRO's are in mm. (If you have selected native units as Inch then the DRO's are in Inches)
The units for the 4 DRO is usually always Degrees.

Hope this helps,

Tweakie.

[Thomss]

Thank you Tweakie, That is exactly what i mend, this makes me better understand.

[Tweakie.CNC]

Mijn Genoegen.

Tweakie.