Dell Alienware M17x (Mid 2009) - Manual (Page 16)

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CHAPTER 2: GETTING TO KNOW YOUR NOTEBOOK
F5 – Decrease Display Brightness
Press <Fn><F5> to decrease the brightness of the LCD display.
F6 – Extend Desktop
Press <Fn><F6> to switch between the various external display
options available either simultaneously or separately.
F7 – Toggle between Integrated/Discrete Graphics
Press <Fn><F7> to switch between
integrated graphics and discrete graphics.
Integrated/binary graphics can be used to reduce your notebook’s
power consumption and extend your battery life, when the high
graphics performance of your discrete GPU(s) is not required.
Discrete graphics can be used when maximum performance is
required.
Switching between integrated/binary graphics and discrete
graphics may require a reboot depending on your system
configuration and the operating system. When in integrated/
binary graphics mode, your discrete graphics card(s), and their
cooling fans are turned off to save power. The use of external display
devices is not supported in the integrated/binary graphics mode.
F9 – Webcam on/off
Press <Fn><F9> to switch off or switch on the webcam module.
F10 – Microsoft Mobility Center on/off
Press <Fn><F10> to launch or close the Microsoft Mobility
Center application.
F11 – AlienFX ® on/off
Press <Fn><F11> to disable or enable the AlienFX illumination.
F12 –Touch Pad on/off
Press <Fn><F12> to switch off or to switch on the touch pad
function and the illumination around the touch pad. When the
touch pad function is switched off, the touch pad can still work
temporarily for three to five seconds while the system reboots
into the Windows ® operating system, or resumes from standby
or hibernation.