Rasagar/Library/PackageCache/com.unity.probuilder/Documentation~/Object_FlipNormals.md

Flip Normals

The Flip Normals action flips the normals of all faces on the selected object(s). This is especially useful if you want to convert an exterior-modeled shape into an interior space.

Tip: You can also launch this action from the ProBuilder menu (Tools > ProBuilder > Object > Flip Object Normals).