Tools > Features > Convert to Datums - (S9-01G) - creates Datum sub-objects based on the geometry of 3D Features. A Sphere 3D Feature yields a Point Datum at its center; a Cylinder 3D Feature yields a Point Datum at its center, an Axis Datum, a Point Datum at its top and bottom, and a Plane Datum at its top and bottom; a Cone 3D Feature yields a Point Datum at its center, an Axis Datum, a Point Datum at its top, and a Plane Datum at its top and bottom; a Plane 3D Feature yields a Point Datum at its center, a Plane Datum, and an Axis Datum to indicate its normal.