i guess it would be nice to have the ability to display the units you're using after each dim, but not one that i would really use myself i'm afraid. UK standards AFAIA are 'mm' for building element measurement, 'm' for RLs . . . it's never cropped up as a problem before where the contractors are building something too big or too small by a magnitude of 10! (that's one i wouldn't want to sort out with the planners )
Here in the UAE there is no rule for the building elements, although the UK education system or its derivatives being responsible
for most of the engineers, mostly people work in mm. Feet and inches are also not unheard of. BUT - for the site layout, Dubai Municipality for example required BOTH feet and meters on the plan.
I would REALLY like to have dimension favorites where a set of dimensions can keep its units; not to have it as a global setting. Or, keep it global, but setting it for a part of the dimensioning set.
ArchiCAD since 4.55 ... 1995