No option to flip UV or Normals directions in the option menu?

Before I got the option to be able to flip the UV normals in the options menu running the Dir Function but now there is no option I have attached a photo below showing the command options…

Moved to Rhino for Mac from Uncategorized.

You can’t flip normals on a closed (solid) object. If you run Dir on a simple surface, do you get the option?

Closed polysurfaces, surfaces, and lightweight extrusion objects cannot have their normal direction facing toward the interior of the object.

Can you not I didn’t realise that! Yes I get the option on a normal surface was my bad then still learning rhino as we speak!