Creo Flexible Modeling > Modifying Analytic Surfaces > About the Modify Analytic Surface Feature
  
About the Modify Analytic Surface Feature
Use the modify analytic surface feature to edit the base dimensions that drive the analytic surface. You can modify the following dimensions of a cylinder, a torus, or a cone.
Cylinder—Radius; the axis remains fixed.
Torus—Radius of the circle and radius from the center of the circle to the axis of revolution. The axis of revolution remains fixed.
Cone—Angle; the axis and vertex of the cone remain fixed.