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Fn key combinations
The following table shows the function of each combination
of Fn with a function key.
Key
combination
Description
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.
Product overview
48 ThinkPad T20, T21, T22, T23 (MT 2647/2648)