Have you applied the latest Surface (Pro and RT) firmware updatesyet? If so, here's a quick rundown of some new keyboard shortcuts you can take advantage of for both the Type or Touch cover on the Surface RT and Surface Pro.
Fn + Caps:Locks the F1-F12 into being available as function keys. Performing it again sets it back to normal.
Fn + <spacebar>:Print screen (entire display)
Fn + >spacebar> + Alt:Print screen for the app with display focus
Fn + Del: Raise the level of screen brightness
Fn + Backspace:Decrease the level of screen brightness
Fn + <left>:Home
Fn + <right>:End
Fn + <up>: Page up
Fn + <down>:Page down