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Fn Key Combinations
The following table shows the Fn key and function key
combinations and their corresponding functions.
The Fn key works independently of the operating system.
The operating system obtains the status through the
system management interface to control the system.
Fn + Result
F2 Fuel-Gauge display on and off
F3 Standby mode
F4 Suspend mode
F7 Switch between the LCD, the external monitor,
and both the LCD and external monitor
F8 Expand/shrink screen
F11 Switch power mode
F12 Hibernation mode
24 ThinkPad 390E