Press F10, and small letters appear over each ribbon tab and quick access toolbar item. Alt+H takes you to the Home tab, Alt+N to Insert, and so on. Once in a tab, additional letters appear for ...

Function keys that enable convenient features like instant browser refreshing or screenshotting pages are lost unless you hold down the “fn” key on your keyboard.

This will make the original row of function keys appear on the Touch Bar, including the Escape key if your Mac doesn't have a physical one.

Press "Fn-F8" to change your computer's wireless connection from Wi-Fi to Bluetooth and back again. Press "Fn-F9" to disable the mouse touchpad. Press the buttons again to enable it.

Select Enable auto-repeat to toggle the auto-repeat function, which repeats the key that is held down multiple times until you let go.