To turn on or off the backlight, press Fn + Spacebar or Esc on the keyboard to change the keyboard backlight mode. There are three modes: Off, Low (dim), and High (bright). Press the keys again to change the modes.

Most Lenovo laptops come with a built-in backlit keyboard, making it easy to type in low-light conditions. To turn on the backlight, simply press the "Fn" and "Spacebar" keys simultaneously. Depending on your model of laptop, you may have a few different options to control your keyboard's brightness settings.

On the keyboard, the keys that are used to enable or disable the backlight is the Fn + Space bar. Hold down the FN key and then tap the Space bar. This is a toggle switch that turns on and off the backlight.