Changed in release 2.43 (12th July 2021)
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Parts list editor :

  o Added a "Make part locations relative to CNC datum" checkbox option to the parts list editor
    "File->Save Parts List as Text" dialog.  When checked, the location of parts in the saved text file
    will be adjusted to be relative the the CNC datum point defined in the artwork.

    N.B: This option is only available if the CNC datum is enabled in "Configuration->Gerber / CNC Output Options"