How to Turn on Backlight on a MacBook Keyboard

Close your Internet browser if you currently have one open on your MacBook, as one of the function keys used for your backlighting is often commonly used by browsers.
Press 'F9' to turn the keyboard backlight on, if it is currently turned off. You can adjust the brightness from dim up to its maximum backlighting by pressing the 'F9' button several times.
Press 'F10' if you need to adjust the backlight so that it is dimmer. Press 'F8' to disable backlighting.
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