The idea is very simple:
Being able to select different items in one page, having them in a clipboard, and pasting them in another order. said items could be text, sketches, marked up images, or even handwritten paragraphs, really could be anything. I feel like we are so used to having the one item copy paste clipboard, but this could be really a huge feature. Also making them stick to the clipboard even after the first paste, is a feature I see a lot of Chemistry/physics/engeneering notes being boosted with.
I hope I delivered the concept.
I am not a graphic designer but here is a sketch of it (made in good notes ) :