Product overview

Fn key combinations

The following table shows the function of each combination of Fn with a function key.

Key

Description

combination

 

 

 

 

Fn+F1

Reserved.

 

 

Fn+F2

Reserved.

 

 

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.

 

Note: To use Fn+F3 for screen blank in

 

Windows 2000 and Windows XP, you must have

 

IBM PM device driver installed on your

 

computer.

 

 

Fn+F4

Turn standby mode on. To return to normal

 

operation, press the Fn key independently,

 

without pressing a function key.

 

 

Fn+F5

Reserved.

 

 

Fn+F6

Reserved.

 

 

Fn+F7

Switch between the LCD and an external

 

monitor (CRT). If an external monitor is

 

attached, computer output is displayed in the

 

following three patterns by turns:

 

v

CRT display

 

v

LCD+CRT display

 

v

LCD

Fn+F8

Turn screen expansion on or off. (There is no

 

symbol on the key.)

 

Note: This function is not supported in Windows

 

2000 and Windows XP.

 

 

Fn+F9

Reserved.

 

 

Fn+F10

Reserved.

 

 

Fn+F11

Reserved.

 

 

Fn+F12

Turn hibernation mode on. To return to normal

 

operation, press the power button for less than

 

four seconds.

 

Note: To use Fn+F12 for hibernation in

 

Windows 2000 and Windows XP, you must have

 

IBM PM device driver installed on your

 

computer.

 

 

Fn+PgUp

Turn the ThinkLight on or off.

 

 

Fn+Home

The LCD becomes brighter.

 

 

Fn+End

The LCD becomes less bright.

 

 

 

48ThinkPad T20, T21, T22, T23 (MT 2647/2648)

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IBM T22, T21 manual Fn key combinations, Key Description Combination