Have an option to apply Annotation style to existing files on open.
Example:
Edit the current Annotation style to include the following settings:
Model Space = 1, Font = Simplex, Font height = 2.0, Length units = Inches decimal,
length factor = 1.0000, Use alternate units = Millimeters decimal, length factor = 1.0000,
Alternate units below, Fraction stacking format = Stack Horizontal