NVSBL P4D v3, Руководство пользователя

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There are five function keys located on the machine surface.
Power key: long press to turn on/off the Mid. When the MID was turned on, user can turn on/off the screen by
pressing this key.
/ - key:
press to increase/decrease the system volume.
Return key:
press to return the previous screen.
Menu key: press to popup the submenu of some interface. When the screen is locked, pressing the menu key can
unlock it.
To your MID, keys return, menu on the touch screen and that on the machine surface have the same function.
Infrared receptor