Surface Keyboard Update Coming Soon

An update will come to the Surface in a few week that will allow for the ability to toggle between what the keys on the top row do, get some quick access to other capabilities like screenshots through shortcuts, and just make some things like paging easier to do with one hand. These include:

Fn + Caps:Locks F1-F12 into being function keys. Do it again and you get the charms, volume, Home, End, etc. if you are in the function lock mode, you can get the inverse options by pressing the Fn key, naturally
Fn + <spacebar>:Print Screen
Fn + <spacebar> + Alt:Print Screen for the in-focus App only
Fn + Del:Brightness Up
Fn + Backspace:Brightness Down
Fn + <left>:Home
Fn + <right>:End
Fn + <up>:Page Up
Fn + <down>: Page Down


Source: Surface Blog