Lenovo ThinkPad T61 Hardware Maintenance Manual page 50

Product overview
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MT 8889, 8890, 8891, 8892, 8893, 8894, 8895, 8896, 8897, 8898, 8899, 8900, 8938, and 8939
Key combination Description
Fn+F10 Reserved.
Fn+F11 Reserved.
Fn+F12 Put the computer into hibernation mode. To return to normal operation,
press the power button for less than four seconds.
Note: To use Fn+F12 for hibernation, you must have the ThinkPad PM
device driver installed on the computer.
Fn+PgUp Turn the ThinkLight on or off.
Note: This function is supported only on the ThinkPad computers that
have the ThinkLight. The on or off status of the ThinkLight is shown
on the screen for a few seconds when you press Fn+PgUp.
Fn+Home The computer display becomes brighter.
Fn+End The computer display becomes dimmer.
Fn+Spacebar Enable the FullScreen Magnifier function.
Fn+PrtSc Has the same function as the SysRq key.
Fn+ScrLk Enable or disable the numeric keypad.
Fn+Pause Has the same function as the Break key.
Fn+cursor keys These key combinations work with Windows Media Player. Fn+down
arrow key works for the Play or Pause button, Fn+up arrow key for the
Stop button, Fn+right arrow key for the Next Track button, and Fn+left
arrow key for the Previous Track button.