LG LM-G910EMW, User Manual, Page: 787 / 804

LG Dual Screen (optional, sold separately) (LM-G905N) 186
Dual Screen Tool
If you connect your phone to the dual screen and turn on the dual screen,
the Dual Screen Tools menu icon appears on the side of the phone
screen.
Tap to open the
Dual Screen Tools menu and access the options shown
below.
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You can tap it lightly to show or hide the Dual Screen Tools menu.
You can switch the screens between the dual screen and the phone.
You can send the screen from the phone to the dual screen.
You can bring the screen from the dual screen to the phone.
If you use the dual screen only, you can lower the brightness level of
the phone screen (main screen) to save battery. If you do not want to
use this function, swipe the main screen.
You can turn off the dual screen.
Dual Screen Tool
Swap screens
Show main on Dual Screen
Show Dual Screen on main
Put main screen to sleep
Turn off Dual Screen