When you display the construction of a spline with interpolation points, you will see not just the interpolation points, but a control polygon as well. Creo Elements/Direct Modeling calculates what control polygon is necessary to create the spline you specify. You can use this operation to display interpolation points, control points and polygons for any spline.
To display or hide interpolation points,
1. Click Modeling and then, in the Draw group, click the arrow next to Spline).
2. To show interpolation points, click Display On in the Spline section.
3. To hide interpolation points, click Display Off in the Change Spline section.
Spline).
Display On in the Spline section.
Display Off in the Change Spline section.
to complete the operation.