All what I wanted to do is to call the piece’s center point 0,0 That’s all

Then either do it in CAD  as i have already shown or per the instructions in that post or if you want you can move the rapid start point as shown in
attached pic. You right LEFT mouse click on the target and then drag it to the center ( the pieces center point will highlight).

RICH

I tried that and when I right click the origin it doesn’t move. If I click on it (left click) then I can relocated it to a new place but as I said before it takes the new position coordinates. When I right click on it an option window is shown:  “Delete Selected Items”, “Join two selected Primitives”, ”Load shape file to screen”, “Save chain as Shapefile” and “Remove shapes”.  Thanks.

Tim

Tim,
My bad....i meant to say left mouse button and updated reply #20.
RICH

If I click on it (left click) then I can relocated it to a new place but as I said before it takes the new position coordinates

The attached shows the relocated origin based on the gcode in Mach. It is in the center of the piece and at 0,0 just like you wanted. 

RICH