Sony VGN-BX500 - Manual (Page 30)

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Using Your VAIO Computer
Combinations and Functions with the Fn Key
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Some functions are not available until Windows is launched.
Combinations/Feature Functions
Fn + F1: wireless switching * Toggles between Bluetooth and Wireless LAN functionalities.
Fn + 2 (F3/F4): speaker volume Adjusts the built-in speaker volume.
To increase volume, press Fn+F4 and then
M or , , or keep pressing Fn+F4.
To decrease volume, press Fn+F3 and then m or < , or keep pressing Fn+F3.
Fn + 8 (F5/F6): brightness control Adjusts the brightness of the LCD.
To increase lightness intensity, press Fn+F6 and then
M or , , or keep pressing Fn+F6.
To decrease lightness intensity, press Fn+F5 and then m or < , or keep pressing Fn+F5.
Fn + / T (F7): switch to the external display
Toggles between the LCD, external device (e.g. monitor) and both LCD and external device.