Reverses the direction of surface normals without affecting the U or V parametric directions.
Reverse the direction of a curve or surface
Prepare a model for import into CAD systems
Reversing the direction of the normal with this tool does not affect the direction of the U or V parameters.
Construction history is also preserved.
All intersecting: display the normals of all surfaces under the cursor.
Closest to eye: display the normal of the nearest surface under the cursor.