Acer 2450 - Manual (Page 25)

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Em
powe
ring Tech
nology
Acer ePresentation Management
Acer ePresentation Management lets you project your computer's display to an
external device or projector using the hot key: Fn + F5. If auto-detection
hardware is implemented in the system and the external display supports it,
your system display will be automatically switched out when an external display
is connected to the system. For projectors and external devices that are not
auto-detected, launch Acer ePresentation Management to choose an
appropriate display setting.
Note: If the restored resolution is not correct after disconnecting a
projector, or you need to use an external resolution that is not
supported by Acer ePresentation Management, adjust your
display settings using Display Properties or the utility provided by
the graphics vendor.