I have found that color coding my comment and callouts is helpful. This is fine if I’m sending my PDFs digitally but often I print them for meetings and our office only has a black and white printer. As a result, there is little ability to distinguish the comment color. I think it’s worth noting that I can also see this potentially being a problem for color-blind users.
What I’d love to see is a selection of pattern overlays that can be put on top of the color. Like these:
They should be subtle enough to not make the color underneath hard to see but apparent enough to allow for a secondary way to distinguish color/categorization. I could also see this feature being useful for making mockups of bar charts and the like, or even for adding shading to certain areas.
Thanks guys and keep up the good work!