Lenovo Y40-70 User Manual page 13

The following describes the features of each function key.
Fn + F1:
Fn + F2:
Fn + F3:
Fn + F5:
Fn + F6:
Fn + F9:
Fn + F10:
Fn + F11:
Fn + PrtSc:
Fn + Insert (Lenovo
Y50-70/Y50-80/Y50-70
Touch/Y50-80 Touch):
Fn + PgUp (Lenovo
Y40-70/Y40-80):
Fn + Home:
Fn + End:
Fn + PgDn (Lenovo
Y40-70/Y40-80):
Fn + / :
Fn + / :
Fn + Space 
(on select models):
Chapter 1. Getting to know your computer
Enters sleep mode.
Turns on/off the backlight of the LCD screen.
Opens the interface for selecting display options.
Enables/disables Airplane mode.
Enables/disables the touchpad.
Opens the Settings charm.
Opens the Search charm.
Displays current apps.
Activates the system request.
Enables/disables the scroll lock.
Activates the pause function.
Activates the break function.
Activates the insert function.
Increases/decreases the display brightness.
Increases/decreases the volume.
Adjusts the keyboard backlight 
(off  dim  bright  off).
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