Yes, to follow up if you just put the keyboard on correctly (not backwards) and put the keyboard behind the back but still Connected you can still use both landscape and portrait.Although you can attach the keyboard backwards for storage and protection of the tablet while using it in portrait mode
Also true. I personally prefer it on backwards as a tablet because it sits flush against the surface and protects the keys.Yes, to follow up if you just put the keyboard on correctly (not backwards) and put the keyboard behind the back but still Connected you can still use both landscape and portrait.