Product overview
Fn key combinations
The following table shows the function of each combination of Fn with a function key.
The Fn key works independently from the operating system.
| Key combination | Description | 
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| Fn + F1 | Reserved. | 
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| Fn + F2 | Reserved. | 
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| Fn + F3 | Turn off the LCD display, leaving the | 
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 | screen blank. To turn the LCD display on | 
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 | again, press any key or the TrackPoint | 
| 
 | stick. | 
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| Fn + F4 | Turn standby mode on. To return to | 
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 | normal operation, press the Fn key. | 
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| Fn + F5 | Reserved. | 
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| Fn + F6 | Reserved. | 
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| Fn + F7 | Switch between the LCD and an external | 
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 | monitor. | 
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| Fn + F8 | Turn screen expansion on or off. (There is | 
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 | no symbol on the key.) | 
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| Fn + F9 | Reserved. | 
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| Fn + F10 | Reserved. | 
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| Fn + F11 | Reserved. | 
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| Fn + F12 | Turn hibernation mode on. | 
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| Fn + PgUp | Turn the ThinkLight on or off. | 
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| Fn + Home | The LCD becomes brighter. | 
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| Fn + End | The LCD becomes less bright. | 
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| Fn + Insert | Audio volume becomes bigger. | 
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| Fn + Delete | Audio volume becomes smaller. | 
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| Fn + Backspace | Mute. | 
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