Keyboard Indicators
Each keyboard indicator is a light labelled with the name or icon for its status:
Icon | Name | Description |
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| Num Lock | Numeric keys are locked as numbers keys and arithmetic |
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| functions. |
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| Caps Lock | Alphanumeric keys are locked to uppercase. |
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| Scroll Lock | Scroll function is locked. |
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Special Keyboard Buttons
There are special buttons (select models only) at the top of the keyboard. (Some models have some of these special buttons on the left side of the main keys.) These buttons operate a CD or DVD player, control speaker volume, connect you to the Internet, or provide quick access to specific functions.
Volume Control
The Volume knob increases speaker volume when turned clockwise, and decreases volume when turned anticlockwise. It can be turned indefinitely, even after maximum sound has been reached.
The Volume Up 
button increases volume, and the Volume Down 
button decreases volume.
The Mute button turns speaker sound on and off.
12PC Basics Guide