Display face orientation only for backward faces: now in 2.82! — Right-Click Select
Blender 2.8 How Show/Hide Face normals? - Technical Support - Blender Artists Community
how can I change my normal direction? I tried with Normal Edit, but I can't see the vertex normal change its direction any help is appreciated! : r/blenderhelp
LES NORMALS
Is it possible to select normals in Blender based on the direction they are facing, so they can be flipped? - Quora
What Are Normals In 3D Modeling? – blender base camp
Blender Face Orientation (Normals) | rgb-labs.com
How to Flip Face Orientation | Flip Normals | Blender 2.9 Tutorial - YouTube