To Hide Facet Edges Whose Angle is Less than Average Normal

Select the Change Mesh Normal tool ( Modeling > Mesh > Modify Meshes ).

Select the option Average Normal.

Click the extended tool settings arrow and in the Display drop-down select Vertex Normals.

Enter the angle of the vertex normal in the text field next to the Average Normal radio button.

Select the mesh element.

The mesh highlights, with graphics displaying the vertex normals of each facet.

Select the Change Normals button in the tool settings window.

Enter a data point.