Acer Aspire 4540 Acer Aspire 4540 Notebook Series Start Guide - Page 6

6 English # Icon Item 14 Speakers Description Left and right speakers deliver stereo audio output. 1. The front panel indicators are visible even when the computer cover is closed up. Hotkeys The computer employs hotkeys or key combinations to access most of the computer's controls like screen brightness, volume output. To activate hotkeys, press and hold the key before pressing the other key in the hotkey combination. Hotkey Icon + + + Function System property Bluetooth Sleep Description Starts System Property for displaying system information. Enables/disables the Bluetooth function. (only for certain models) Puts the computer in Sleep mode. + + + + < > Display toggle Screen blank Speaker toggle Brightness up Switches display output between the display screen, external monitor (if connected) and both. Turns the display screen backlight off to save power. Press any key to return. Turns the speakers on and off. Increases the screen brightness. + < > + < > + < > Brightness down Decreases the screen brightness. Volume up Increases the sound volume (only for certain models). Volume down Decreases the sound volume (only for certain models).