Of course you can also use the new display brightness buttons in the action center with.
Surface pro 4 keyboard backlight turn on.
Enable keyboard lighting and select the brightness you want.
Press the fn key again to unlock them.
If you want to turn it on you can press and hold the key next to the key which you.
To turn off the backlight in the surface keyboard press the key next to esc key see the image below.
Next choose the time for keyboard backlight s auto shutdown.
Click on the tab to access additional options.
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.
Press the fn key to lock the function keys.
So this is how you turn the backlight of the keyboard on or off.
Move the slider under the keyboard backlight tab to the right to enable the backlight.
Simply press fn del to increase or the fn backspace buttons to decrease the display brightness.
Decrease the keyboard backlight off with fn f1.
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.
Increase the keyboard backlight on with fn f2.