Press the fn key again to unlock them.
Surface pro 4 keyboard backlight turn on.
If you want to turn it on you can press and hold the key next to the key which you.
Increase the keyboard backlight on with fn f2.
If you keep on pressing this key you can see that the backlight intensity goes down until it switches off completely.
Activating the special keys increases or decreases the keyboard backlight on the surface keyboard.
So this is how you turn the backlight of the keyboard on or off.
Click on the tab to access additional options.
A light appears on the fn keys when the keys are locked into function mode.
So in case you are running out of battery you can disable the backlight or if you are working in an environment where there is adequate lighting you can always turn off the backlight.
To turn off the backlight in the surface keyboard press the key next to esc key see the image below.
Decrease the keyboard backlight off with fn f1.
Simply press fn del to increase or the fn backspace buttons to decrease the display brightness.
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Enable keyboard lighting and select the brightness you want.
Move the slider under the keyboard backlight tab to the right to enable the backlight.