I don't think there is currently and I agree we could use some further method of visual organization for larger projects. I've got some projects that got quite big and they're a bit harder to follow now.
Personally, I could use just a couple, maybe even just 2, alternate color comment sections.
I also thought it'd be neat to have notes that overlayed the event sheet, preferably ones with arrows that you could point to relevant areas of the sheet. Just a bit of a daydream. :)