Sensor settings
In most applications, the display rotates automatically
between the portrait and landscape modes based on
the orientation of the device.
To change the setting for automatic display rotation,
select
Settings
>
General
>
Sensor settings
>
Turning control
and whether you want the display to
rotate automatically.
To ensure that the automatic display rotation works,
hold the device in an upright position.
Automatic rotation does not work if you change the
display rotation setting manually in an application.
When you exit the application, automatic rotation is
activated again.