How do you change the screen background color?

Apologies if this has been asked before, but I need to change the screen background color from the default yellow to black so I can view white vector linework and text. I'm using Global Mapper 14.2 64bit. Where can I change it?
Thanks.
Thanks.
Comments
Thanks,
Mike
Global Mapper Guru
geohelp@bluemarblegeo.com
Blue Marble Geographics for Coordinate Conversion, Image Reprojection and Vector Translation