2Key CombinationsNOTEz Do not repeatedly press the keys in quick succession.z Do not use the key combinations together with touch pad (external mouse), touchscreen (only for model with touch-screen), dual touch (only for model with dual touch), tablet buttons, or other key operations.z Do not use the key combinations before you log on to Windows. Wait until the hard disk drive indicator turns off.On the Setup Utility screen, you can use the key combinations of Fn+F1, Fn+F2 and Fn+F3.z The key combinations may not work with some applications.z The popup menu icon appears after logging on to Windows. It may not appear in some application conditions (e.g.,when [Command Prompt] is set to “Full Screen”).Key Function Popup menu iconFn+F1*1Fn+F2*1LCD brightness(Fn+F1= down / Fn+F2= up)Fn+F3 Display switching (Î page 44)(When an external display is connected)Internal LCD Simultaneous display External displayCAUTIONz Do not press any keys until the display has finished switching.z Do not use this function:• When an external display is not connected.• When playing motion video such as DVD or MPEG.• When using the Extended Desktop.• When showing a game screen such as pinball.z Until Windows startup is completed (during Setup Utility, etc.), the simulta-neous display cannot be used and pressing Fn+F3 switches the displaybetween the internal LCD and the external display.