Samsung Galaxy Note 4 - Manual (Page 21)

Getting started
21
Turning the device on and off
Press and hold the Power key for a few seconds to turn on the device.
When you turn on your device for the first time or after performing a data reset, follow the on-
screen instructions to set up your device.
To turn off the device, press and hold the Power key, and then tap Power off.
Follow all posted warnings and directions from authorized personnel in areas where
the use of wireless devices is restricted, such as airplanes and hospitals.
Locking and unlocking the screen
Pressing the Power key turns off the screen and locks it. Also, the screen turns off and
automatically locks if the device is not used for a specified period.
To unlock the screen, press the Power key or the Home key and swipe in any direction.
You can change the screen lock method and utilise additional security features. Refer to
Changing the screen lock method for more information.