Go to a map with a large area to dig, like map 1. Hold shift, drag an area to mark for digging Make the boundbox as large as it goes, and beyond, as if you were to tag e.g. a 15x15 area. Release the ...
The Draft Label prints the volume of the "magnet" - 614.000 mm³ there is a macro that recomputes the document, then prints the text of this label. When executed from FreeCAD with GUI this prints ...
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