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Modifier Key

Example: "Modifier keys are commonly used to enter keyboard shortcuts."

A modifier key is a key that modifies the action of another key when the two are pressed together. Common modifier keys include Shift, Control, Alt, Command, Option, and Function. The Control (Ctrl) and Alt keys are typically found on Windows keyboards, while the Command (Cmd) and Option keys are typically found on keyboards designed for Macs.

The Shift key, which is found on all computers, is used to capitalize letters and enter symbols (such as the ones found above the number keys). The Control and Command keys are typically used to enter keyboard shortcuts.

Published: March 31, 2010

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Definition from the PC Glossary