> On Oct 31, 2014, at 1:09 PM, Glen Chiacchieri wrote:
>
> The red sections are different opacities because it occurred to me that not all highlight/annotations are equal! Why not have shades of reaction?

I love this idea. I do it in real books but am peeved I can't do it digitally. I end up with embarrassing rainbows in my PDFs.

>
> In fact, the yellow "what you've read so far" sections could become more opaque the more time you look at specific passages. This would create a sort of heatmap (ugh) of where you've spent your time. And of course this might be extended to everyone that's ever read a work so you could see how all readers have interacted with it.

Makes me think of a fog of war mini map. Which in a sense users annotate with their constructions and agents.