Touch Keys
The Touch Keys are displayed in a bar at the bottom of all of the screens to provide easy navigation within the device software.
NOTE
The Touch Keys are displayed along the right side of the screen when the phone is held in landscape orientation.
Back
Key: Tap to back up one step at a time and close on-screen
items such as pop-up messages, the on-screen keyboard, etc. Touch
and hold it to activate Dual window mode, which allows you to open
two apps at the same time.
Home
Key: Tap to immediately return to the Home screen. Touch
and hold it to access Google Now.
Recent
Apps Key: Tap to display all of your open apps. Touch
and hold it to access the Options menu for the current app or screen.