Table 8. Fn key combinations (continued)

Key combination

Description

 

 

 

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 between the computer display and an external monitor. If an external monitor is

 

attached, computer output is displayed in the following three patterns by turns:

 

• External monitor (CRT display)

 

• Computer display and external monitor (LCD + CRT display)

 

• Computer display (LCD)

 

Notes:

 

This function is not supported if different desktop images are displayed on the computer

 

display and the external monitor (the Extend desktop function).

 

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 settings.

 

Note: Multiple users can log on to a single operating system by using different user IDs. Each

 

user needs to do the following: Click Start All Programs ThinkVantage Presentation

 

Director, and change the Fn+F7 settings.

 

 

Fn+F8

Change the settings of the UltraNav® pointing device.

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.

 

Notes:

 

To use this combination of the keys, ThinkPad PM device driver must have been installed

 

on the computer.

 

Though the screen fades out immediately after Fn+F12 are pressed, the computer

 

does not enter the hibernation mode immediately. Do not move the system until the

 

sleep (standby) status indicator stops blinking. Moving the computer when it is entering

 

hibernation might cause corruption of the hard disk drive.

 

 

Fn+PgUp

Turn the ThinkLight® on or off.

 

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.

 

The purpose of this method is to change the brightness level temporarily. On Windows Vista,

 

the default brightness level is loaded after sleep (standby), hibernation, reboot, or detaching or

 

attaching an ac power adapter. To change the default brightness level, change the settings of

 

the Power Option in the Control Panel or use the Power Manager.

 

 

Fn+End

The computer display becomes dimmer.

 

The purpose of this method is to change the brightness level temporarily. On Windows Vista,

 

the default brightness level is loaded after sleep (standby), hibernation, reboot, or detaching or

 

attaching an ac power adapter. To change the default brightness level, change the settings of

 

the Power Option in the Control Panel or use the Power Manager.

 

 

Fn+Spacebar

Enable the Full Screen Magnifier function.

 

 

54ThinkPad T420 and T420i Hardware Maintenance Manual

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Lenovo T420i manual For Windows Vista and Windows XP