Toshiba Satellite Pro 6000 Series - Manual (Page 260)

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Display modes
Fn + This hot key cycles through the power-on display options.
The display modes are:
❖
Built-in display panel only
❖
Built-in display panel and external monitor
simultaneously
❖
External monitor only
❖
Built-in display panel and external video device
simultaneously
❖
External video device only
Sample display options window
In o rder to use a simultaneous mode, you must set the
resolution of the internal display panel to match the
resolution of the external display device.