I facilitate multi-day workshops, and frequently have to lug overstuffed four-inch binders around with me. Sometimes more than one. The challenge here is, I have to modify the pages each time I facilitate, based on client specifics, new learnings/research, etc. I have a system where I have five different colours of Post-It notes that I swap in and out on the pages. Some pages have had the same Post-Its on them for years, some change weekly. What would be ideal would be, is if I could scan the pages - without the Post-It notes on them - and load them on my iPad, and then add some kind of virtual Post-It notes to each page. (Of course, I'd need my five colours). So some way to add colour-coded notes that are editable and re-positionable to a PDF is exactly what I'd like to see. Surely such a thing exists!