System Information
Operating system: Windows 10
Graphics card: GeForce GTX 780 Ti
Blender Version
Date: 2018-11-29 15:57
Hash: 26d5a3625ed
Branch: blender 2.80 (Beta)
No shortcut or menu entry for flipping normals
There is SHIFT+N to calculate normals outside and SHIFT+CTRL+N to calculate normals inside, but no menu entry (or keyboard shortcut) for Mesh/Flip Normals. It's in HELP but not in any menu or shortcut