To exit full screen on a Mac, you can follow these steps:
1. **Press the Esc Key**: Many applications that support full-screen mode allow you to exit by simply pressing the Esc key on your keyboard. Try pressing Esc first, and if it works, you'll exit full-screen mode immediately.
2. **Use the Green Button**: If pressing Esc doesn't work, move your cursor to the top-left corner of the screen while in full-screen mode. You should see the green button in the top-left corner of the window. Clicking on this button will typically exit full-screen mode.
3. **Keyboard Shortcut**: You can also use the keyboard shortcut Control + Command + F to exit full-screen mode in many applications. Hold down the Control and Command keys on your keyboard, and then press the F key.
4. **Menu Option**: In some applications, you can exit full-screen mode by going to the menu bar at the top of the screen and selecting the "View" menu. Look for an option like "Exit Full Screen" or "Toggle Full Screen" and click on it to exit full-screen mode.
Try these methods and see which one works for the specific application you're using. If none of these methods work, consult the application's documentation or support resources for instructions on how to exit full-screen mode.