You can manually adjust the coordinates and create reference points on the perimeter of an area.

1. Open the Area Properties popup window.
2. Click on the Coordinates tab.
3. Select the point you want to use as a reference point. The point you select in the list is highlighted in the Area tab.
4. Click Ref. Point.
5. In the Enter name of reference point field, enter a name for the reference point.
6. Klicken Sie auf OK.