see, this is where your purpose would play a role. when you preview and postview, you get an idea of 1. what you are interested in and 2. where you can find it.
so when you activate, you jump to that portion and super read. when you see something that addresses your question, you dip in. once you are done, you move to another question. this is how you locate where to dip in.
and when you dip, your eye consciously recognize the link in your subconscious and a stream of information comes alive. and so, to record that, you will start making a mindmap. and when you start making a mindmap, you will see new associative information jumps in... you may even remember some instances in the past that are some or the other way associated to the information you are mindmaping.