Creo Options Modeler > References > Fundamentals > Creo Parametric User Interface > The Analysis Tab > Measuring Geometry > Measuring Entities > Using Specific Measurement Types > Distance > Using Reference Entity Options > Example: Axis Option
  
Example: Axis Option
The Axis Option Is Not Selected for the Surface
The distance is measured from the cylindrical shaped surface to the second selected entity.
The Axis Option Is Selected for the Surface
The distance is measured from the axis of the cylindrical shaped surface to the second selected entity.