Lenovo ThinkPad T420 4177 Hardware Maintenance Manual page 68

Table 8. Fn key combinations (continued)
Key combination Description
For Windows 7:
Switch a display output location
• Computer display only (LCD)
• Computer display and external monitor (same image)
• Computer display and external monitor (extended desktop)
• External monitor only
Note: To switch between the computer display and an external monitor, the Win+P key
combination is also available.
For Windows Vista and Windows XP:
Switch a display output location
• External monitor
• Computer display (LCD) and external monitor
• Computer display (LCD)
• This function is not supported if different desktop images are displayed on the computer
• This function does not work while a DVD movie or a video clip is playing.
To enable this function, start Presentation Director, and change the Fn+F7 settings.
Note: Multiple users can log on to a single operating system by using different user IDs. Each
user needs to change the settings.
Fn+F8 Change the settings of the UltraNav
Fn+F9 Reserved.
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
Note: This function is supported only on the ThinkPad Notebooks 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. The indicator of numeric lock will be displayed on
the screen.
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.
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Hardware Maintenance Manual
display and the external monitor (the Extend desktop function).
®
on or off.
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pointing device.