Please add this to your feature especially on PDF documents where in the margins of a book is note enough to write some additional notes, could we just have an extra space outside the PDF page without doing it on another notebook? So that when we review that book, it was all in one place? If it will be hard for you to do then why not try a collapsible sticky note that could be put on the edge of a pdf margin so it would look like an extender on the same page of a pdf? Thank you so much. More power.