I would love it if we would be able to have notes on the side of our pages for easier annotating. Whenever I upload a PDF of some sort, I find it difficult to keep all my annotations spaced out on the page, especially with uploaded textbook pages where there is a lot of text and very small margins. Being able to add images and diagrams to the side for note taking would also be great, as sometimes I want to see it as a reference but don't actually want it on my page. The sticky note feature doesn't suit well as the sticky notes aren't large enough sometimes and still cover portions of the page when they're open. I would love it if these would also be permanent, so we can reference back to them when re-opening the annotated pages.