The blip page is not entirely necessary. It is one way to know you are maintaining a divergent gaze...the other way is to notice the four corners and the white space on the pages.
You can know that your nonconscious mind processes 1 million to 1 more information than your conscious mind. The main purpose of PhotoFocus is to get the editing function of the conscious mind out of the way so that your nonconscious can do its excellent work.