Model-Based Definition > Model-Based Definition > Creating Various Annotation Types > Dimension Properties > Driven Dimensions > Example: Driven Dimensions With a Spherical Surface Reference
  
Example: Driven Dimensions With a Spherical Surface Reference
When creating a driven dimension, if you select a spherical surface by clicking it or double-clicking it, Creo Parametric creates a spherical radius or diameter dimension. The following figures display spherical dimensions and the prefix for the numerical dimension values.
Spherical Diameter Dimension
Spherical Radius Dimension