Go to the Keyboard settings (Or tap on the gear icon)
Than tap on Keyboard Layout and Feedback
go Size and Tranparency
You should be able to chage the layout there.
This is actually hilarious. Never really occurred to me that the bottom edge can be dragged lower than it is too until now. The fact that this effectively repositions your keyboard, yet nothing points this out in either the name or description of the setting page kinda throws me for a loop. I mean, what the hell Samsung?