Simply press fn del to increase or the fn backspace buttons to decrease the display brightness.
Surface pro 4 keyboard backlight turn on.
Increase the keyboard backlight on with fn f2.
For surface 3 type cover type cover for surface pro 4 surface go signature type cover surface pro signature type cover surface laptop and surface book.
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.
Decrease the keyboard backlight off with fn f1.
Of course you can also use the new display brightness buttons in the action center with.
If you keep on pressing this key you can see that the backlight intensity goes down until it switches off completely.
Move the slider under the keyboard backlight tab to the right to enable the backlight.
Activating the special keys increases or decreases the keyboard backlight on the surface keyboard.
Next choose the time for keyboard backlight s auto shutdown.
So this is how you turn the backlight of the keyboard on or off.
Press the fn key to lock the function keys.
Click on the tab to access additional options.
To turn off the backlight in the surface keyboard press the key next to esc key see the image below.
Press the fn key again to unlock them.