I don’t know whether this is possible, but I think it would be great if one could add/link a document into a notebook.
But not in the way that you would have to get through the pages but for example, you‘d see the icon of the document or document folder on the page in your notebook and when you click on it, the linked document would open up.
This would be especially great for word documents, since I sometimes write something into a notebook but I don’t like the text box option. Having the option to link the document, I could have a quick look onto it and then close it again without having to close the notebook. It would be like a post it on the page, just as a whole document.