How to know where to faces are flipped?

In blender 2.79 was blue edges growing from faces like this

How to active this in 2.8 ?

overlays at the bottom

In 2.8 you can also see face orientation easier with a new option.
it displays backfaces in red and front faces in blue

alternatively tick that face orientation button under wireframe.

is there a quick menu where you can have the options for normals ?
or may be a new addon in UI panel to get these options way faster
then it is right now

happy bl