I don't really understand what the keyboard has to do with it but it's so you can use the s pen to make a note on pic and save, share, make a note. If you don't want the auto edit to pop up, go to display> edit after screen shot and disable. It will still end up in notification bar but that is an easy swipe to be rid of it. I use it all the time to make notes on screen shots. Very good feature in my opinion.
ATT N3