Lenovo Support & downloads - Function (Fn) key combinations

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Function (Fn) key combinations - ThinkPad A20

Fn key combinations

The following table shows the function of each combination of Fn with a function key. The Fn key works independently from the operating system.

Key combination	Description
Fn + F1	Reserved
Fn + F2	Reserved
Fn + F3	Turn off the LCD display, leaving the screen blank. Press any key or the TrackPoint stick to turn the LCD display on again.
Fn + F4	Turn standby mode on. Press the Fn key to return to normal operation.
Fn + F5	Reserved
Fn + F6	Reserved
Fn + F7	Switch between the LCD and an external monitor.
Fn + F8	Turn screen expansion on or off. (There is no symbol on the key.)
Fn + F9	Reserved
Fn + F10	Reserved
Fn + F11	Reserved
Fn + F12	Turn hibernation mode on.
Fn + PgUp	Turn the ThinkLight on or off.
Fn + Home	The LCD becomes brighter.
Fn + End	The LCD becomes less bright.