The default format for a radius and diameter dimension is inserted with a prefix "R" and diameter symbol ahead of the measured dimension. Our company standard pre-Inventor was to place either "RAD" or "DIA" after the measured dimension. We can not seem to find anywhere in the setup to change how these type dimensions are inserted as a default or custom setting.
Can we change/customize the radius and diameter dimension formating?
ANSI uses R and Ø
I see no way to change the default for these, but one can add a suffix in the dimensioning styles.... but then you'd have the Symbol up front and your text designation on the tail end.
I suggest you embrace the standards, it's always hard to walk away from "this is how we've always done it".