Creo Direct > Using Selection in Creo Direct > Selecting Surfaces > Geometry Rules for Selecting Surfaces
  
Geometry Rules for Selecting Surfaces
You can select surfaces based on certain geometry rules. Depending on the selected surface and the geometry tool, the relevant geometry rules appear. You can then choose a geometry rule to automatically collect surfaces to form a surface set. All the surfaces in the set share a geometric relationship with one another. You can also exclude selected surfaces from the surface set.
The geometry rules applicable to each selected surface type follow:
Surface Type
Coplanar Rule
Parallel Rule
Coaxial Rule
Equal Radius Rule
Same Convexity Rule
Planar
x
x
Revolved
x
Cylindrical
x
x
x
Spherical
x
x
x
Toroidal
x
x
Conical
x
x