Hello,
It would be useful that, when one adds a Note to a paper, this would be somehow more visible than just by making the pencil icon a bit thicker. This could be done by either also changing the color of the pencil icon to red (for example), or by putting a “1” next to the thicker pencil icon (as done for Attached Files)… even though I think the former would make more sense as such a number would always be “1” for Notes.
Of course Notes are searchable, but having a more obvious visual clue that there is a note associated with a certain paper would certainly not hurt!
Best, Luca