Android setting

[iStasis]

Monday evening I ran a system reseton my phone however before i ran the reset using only the OS and nova launcher when i rotated the screen the navigation buttons always vanished off to the side so in landscape mode the buttons didnt show unless you swipped in off the edge of the phone. Since resetting the phone it now constantly shows the google status bar along the top and the navigation bar on the side. how do i revert this setting to auto hide.