While sharing a PDF document, I was hoping to set my note block text a certain color, and then highlight using a similar color. The problem is that the note blocks are constrained to the existing margins of the PDF document, which results in notes covering the text. This is not very productive as a feature.
I don“t know how difficult it would be, but allowing note blocks to be placed and saved outside of the PDF document margins would be very useful as a collaboration feature.