Sony VGN-SZ660N - Manual (Page 19)

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Getting Started
Scroll lock
Press the Scr Lk key to change how you scroll the display. Normal scrolling resumes when the Scroll lock
indicator is off. The Scr Lk key functions differently depending on the program you are using and does not work
with all programs.
Bluetooth technology
Illuminates when the WIRELESS switch is set to ON and Bluetooth technology is enabled.
Wireless LAN Illuminates when the wireless LAN functionality is enabled.
Wireless WAN * Illuminates when the wireless WAN functionality is enabled.
* On selected models only.
Indicator Functions