Just PR the whole thing and skim it as you have been doing. You'll activate the sections you want as you want in your order of priority. You'll probably find that things make sense a lot easier and you might even find yourself working on a project and know just how to handle it without looking back at the book.

The inner mind can handle a whole lot more than we give it credit for. The logical analytical mind has problems with pictures and diagrams. The creative mind handles them no worries. It's the analytical mind that worries about understanding the pictures. We don't seem to trust our creative inner mind to understand and make sense of it for us. That why we have to activate a book in order to gain comprehension.
Hel, has given the best advise for handling the pictures consciously. 
Alex