Flip Screen in Tent Position

Inspiron 11 - 3000, Windows 10 Home.  My screen does not flip in tent position. I have tried Display/Orientation/Landscape Flipped and it does not flip automatically.  

A previous post mentions a driver re-install, but isn't there a simple setting that needs to be changed?

Okay figured it out. Click Action Center icon (far right on task bar).  Click Tablet mode which allows you to unlock the roation lock icon (also in Action Center).