Acer Extensa 5510 - Manual (Page 54)

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English
+ Screen blank Turns the display screen
backlight off to save power.
Press any key to return.
+ Touchpad toggle Turns the internal touchpad on
and off.
+ Speaker toggle Turns the speakers on and off.
+ <↑> Volume up Increases the sound volume.
+ <↓> Volume down Decreases the sound volume.
+ <→> Brightness up Increases the screen brightness.
+ < ←> Brightness down Decreases the screen brightness.
Hotkey Icon Function Description