Microsoft W840DI - Manual (Page 29)

User's Guide Before You Begin
1.13 The <Fn> Key
The <Fn> Function Key is located near the bottom-left corner of the keyboard. This key is
used together with other keys to activate certain pre-defined functions. To activate these
functions, press and hold down <Fn> together with the keys described below:
Sleep Switch
Press this key combination (Fn+F1) to enter sleep mode. In sleep mode, the
LCD display and selected devices would be switched off for less energy
consumption.
Wireless LAN Switch
Press this key combination (Fn+F2) to power on and power off the Wireless
LAN module. Powering on the Wireless LAN by pressing this key
combination (Fn+F2) does not automatically activate the Wireless LAN
function. After powering on, you need to activate the Wireless LAN function
through Windows™. The main purpose of this key combination (Fn+F2) is to
provide you a quick way to turn off the power of Wireless LAN when entering
venues like airplanes, airports, and hospitals where the usage of Wireless LAN
is prohibited or not advisable.
LCD/CRT/TV Switch
Press this key combination (Fn+F3) to switch between LCD only, CRT only,
TV only, LCD/CRT simultaneously, and LCD/TV simultaneously.
Web Cam Switch
Press this key combination (Fn+F4) to power on and power off the Web Cam
module. After powering on the Web Cam, you need to activate its function
through Windows™.
Touch Pad Switch
Press this key combination (Fn+F5) to switch off and to switch on the touch
pad function. When the touch pad function is switched off, the touch pad
device still can work temporarily for three to five seconds during system
reboots into Windows™ operating system, or resumes from standby or
hibernation.
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