Asus Fonepad Note 6 - Manual (Page 39)

K00G 
Screen views
The built-in gravity-sensor of your ASUS Fonepad enables automatic screen
rotations depending on how you hold it. You can quickly switch between a
landscape or portrait view by steering your ASUS Fonepad to the left or to the
right.
NOTE: When in Home Screen, the orientation is in portrait mode only.
Landscape view
Portrait view