Reversing Face Normals

Invert the normal of a face.

1. Select the part that you want to reverse the face normal.
2. On the Transform tab, in the Alter group, click the  Reverse normals icon.

Use a display setting to colour the geometry according to the normal direction of the faces.

3. [Optional] On the 3D View context tab, on the Display options tab, in the Style group, click the Colour icon. From the drop-down list select  Element normal.
   Note:

   • Geometry
     • Normal side: Green
     • Reverse side: Red
   • Mesh
     • Normal side: Blue
     • Reverse side: Brown