Acer AOD257 - Manual (Page 7)

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You can control many functions of your computer using hotkey
combinations as described below.
Going online
The Instant-on feature of your new computer allows you to access
email and Internet content within a few seconds of pressing the power
button.
Connecting to a network
Your computer should automatically detect any wired network.
However, you will need to manually connect to a wireless network the
first time you use it.
On the Home screen, press the Menu key or right-click to open the
Settings menu. Click Settings > Wireless controls. Then select Wi-Fi
settings and your computer will scan for available networks. Click the
selected network and click Connect in the dialog box that opens.
Hotkey Function
+ Turn the communication functions on or off.
+ Enter sleep mode.
+ Toggle external display.
+ Turn display on or off.
+ Turn touchpad on or off.
+ Turn audio on or off.
+ Turn NumLk on or off.
+ Right arrow Increase display brightness.
+ Left arrow Decrease display brightness.
+ Up arrow Increase system volume.
+ Down arrow Decrease system volume.