Found out how to do this on S Note on the Note 3 guys!
In a note, hit phone settings button and touch edit pages.
At bottom of screen there's a bar saying "copy pages from other notes".
Choose the notebook you want to copy from.
In the original notebook at top of screen select the page you want to copied pages to appear after
The touch the pages in the notebook you're copying from at the bottom of the screen and they will be added to the original notebook at the top of the screen.
Yay! This was really bugging me.
Well done Samsung, I knew it must be there somewhere.
Now please just fix that bloody Knox software bug please...