Add area measurements to polygons without units

I'd like to be able to add area measurements to polygons without units. For example, when I add measurements to polygons, GM generates area measurement field with (nnn.n acres) instead of (nnn.n). I'd like the to have the option of adding measurements as a number instead of text to allow measurement based work. Perhaps I'm missing a function and I apologize if that's the case. Thanks for your time.
Comments
Let me know if I can be of further assistance.
Thanks,
Mike
Global Mapper Support
support@globalmapper.com