In project preferences, calculation units & rules there is a Note saying "Calculations using Graphic Templates will override these settings"
I typed "Graphic Template" into the help file search box, and then into this site's search engine, and nothing came up that actually explains the term. Can someone please enlighten me?
...and the reason I'm in the project preferences in the first place...
The "Area Unit" is set to "square meter", but my zones are still showing areas in mm². Presumably it's this "Graphic Template" that's to blame? If so, where do I find it?