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Key icon

 

What it does

 

Function keys 

The function keys are used to perform specific tasks. They’re labeled as F1, 
F2, F3, and so on, up to F12. The functionality of these keys differs from app 
to app. 
  

Fn 

Enables the function keys. A light appears on the Fn key when you’ve locked 
the keys into function mode. See below for more info about bow to lock Fn 
keys into function mode. 
  

Lock keys into function mode 

 

If you’re using an app that uses function keys a lot, you can lock the top row of keys temporarily 
so the function keys are locked. 

Here's how to lock and unlock the function keys: 

 

For Type Cover, Type Cover 2, and Type Cover for Surface Pro 3

 

Hold down the 

Fn

 key and press the 

Caps

 key to lock the function keys. Hold down the 

Fn

 key

 

and press the 

Caps

 key again to unlock them. 

  

 

For Surface 3 Type Cover, Type Cover for Surface Pro 4, Surface Go Signature 
Type Cover, Surface Pro Signature Type Cover, Surface Pro X Signature 
Keyboard, and Surface Pro X Keyboard 

 

Press the 

Fn

 key to lock the function keys. Press the 

Fn

 key again to unlock them. A light 

appears on the Fn keys when the keys are locked into function mode. 

Use the fingerprint reader 

 

The Surface Pro 4 Type Cover with Fingerprint ID includes a fingerprint reader that lets 
you sign in to your device with Windows Hello.  

  

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