How do you get the window to fit your monitor using a F key?

To fit a window to your monitor using a function key, you can typically press the "F11" key to toggle full-screen mode in many applications and browsers. Alternatively, on Windows, you can use "Windows Key + Shift + M" to restore minimized Windows, and "Alt + Space" followed by "X" to maximize a selected window. Check your specific application or operating system shortcuts, as they may vary.