Limelight
What are Modifier Keys?
Modifier keys are keys such as Command, Option, Control, and Shift that change the behavior of other keys, combining with them to form keyboard shortcuts.
Modifier keys are special keys that do nothing on their own but alter what another key does when held together. On macOS the main modifiers are Command (⌘), Option (⌥), Control (⌃), and Shift (⇧). Pressing a letter alongside one or more modifiers produces a shortcut, such as ⌘C to copy or ⇧⌘4 to capture part of the screen.
Modifier keys differ from ordinary character keys, which insert text, and from function keys, which often map to dedicated actions. Their purpose is to multiply the number of commands available from a single keyboard by combining with other keys, which is why nearly every shortcut on a Mac begins with one or more modifiers.
When presenting on a screen, modifier-key combinations are exactly the actions an audience needs to see to follow along. Limelight is built around modifier keys on macOS: its features use ⌃⌥ combinations (⌃⌥1, ⌃⌥2, ⌃⌥3), and its on-screen keystroke display shows modifier-key shortcuts as clean badges so viewers can see the combinations you press.
Why Limelight
- ▸Keys like ⌘, ⌥, ⌃, and ⇧ that change what another key does
- ▸Combine with other keys to form keyboard shortcuts
- ▸Do nothing on their own; they modify the key pressed with them
- ▸Limelight uses ⌃⌥ hotkeys and displays modifier-key shortcuts on screen
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FAQ
- What are the main modifier keys on a Mac?
- Command (⌘), Option (⌥), Control (⌃), and Shift (⇧). They combine with other keys to form shortcuts, which Limelight can display on screen.
- Do modifier keys do anything by themselves?
- No. A modifier key changes the behavior of another key pressed at the same time, rather than producing input on its own.