To enter and exit full-screen mode on a Mac, you can follow these simple steps:

Entering Full Screen Mode:

  1. Open the application or window you want to enter full-screen mode.
  2. Look for the green button in the top-left corner of the window’s title bar. It usually has a diagonal arrow pointing outward.
  3. Click on the green button, or press the Control key and click anywhere on the window’s title bar, then choose “Enter Full Screen” from the menu that appears.
  4. The window will expand to fill the entire screen, entering full-screen mode.

Exiting Full Screen Mode:

  1. To exit full-screen mode, move your cursor to the top of the screen to reveal the application’s menu bar.
  2. Look for the green button in the top-left corner of the menu bar. It should now have a diagonal arrow pointing inward or a broken square icon.
  3. Click on the green button, or press the Control key and click anywhere on the menu bar, then choose “Exit Full Screen” from the menu that appears.
  4. The window will shrink back to its original size, exiting full-screen mode.

Alternatively, you can use keyboard shortcuts to enter and exit full-screen mode:

  • To enter full screen: Press the Control key + Command key + F.
  • To exit full screen: Press the Control key + Command key + F again, or press the Escape (Esc) key.

Please note that not all applications or windows support full-screen mode. Some applications may have different methods or specific menu options for entering and exiting full-screen mode.