Symptoms

You are unable to toggle Zoom and Invert colors using their key commands.

Resolution

To enable the "Invert colors" keyboard shortcut, open System Preferences. Choose Keyboard from the View menu. Click Keyboard Shortcuts, then click Accessibility. Select "Invert colors".

To enable the Zoom keyboard shortcuts, open the Accessibility Options window.

• On a portable Mac's built-in keyboard, press Function-Command-Option-F5 (Fn-?-?-F5).
• If you use an external keyboard, press Command-Option-F5 (?-?-F5).