How to use the function (Fn) keys on the keyboard - ThinkPad R40, R40e
The following table shows what each function key (Fn) key on your keyboard is for and how to use them.
The Fn key works independently of the operating system.
Fn + F1
Fn + F2
Fn + F3
Turn off the LCD display, leaving the screen blank. To turn the LCD display on again, press any key or the TrackPoint stick.
Fn + F4
Put the computer in standby mode. To return to normal operation, press the Fn key independently, without pressing a function key.
Note: In Windows 2000 and Windows XP, this combination of buttons functions as a sleep button. The setting can be changed so that pressing it puts the computer into hibernation mode or even shuts the computer down.
Fn + F5
Turn the Bluetooth on or off.
Fn + F6
Fn + F7
Switch between the LCD and an external monitor (CRT). If a CRT is attached, computer output is displayed in the following three patterns by turns:
LCD + CRT
Fn + F8
Switch the computer screen size between expanded and normal mode if the computer display image is smaller than the physical display.
Note: This function is not supported in Windows 2000 and Windows XP.
Fn + F9
Turn off the Easy Eject on or off.
Fn + F10
Fn + F11
Fn + F12
Put the computer into hibernation mode. To return to normal operation, press the power button for less than four seconds.
Note:: In Windows 2000 and Windows XP, you can use Fn+F12 for hibernation only if the PM device driver has been installed on the computer.