Diameter / Radius dimensions are ideal when the diameter or radius of a circle, cylinder, or sphere needs to be dimensioned.
The diameter / radius dimension properties are as follows:
The following unique settings are available:
Display Angle. Specifies the angle around the circle to which the dimension is oriented.
Dimension Radial Offset. For angular dimensions this value controls the vertical shift of the text inward or outward from the apex of the dimension.