i have understood the system.i use photoreading on everything.let me explain"my purpose is to master a subject in project finance".i want to use the tools in project finance to decide and set a project for my company.thats my purpose.now i prepare,preview and photo read.i activate and mindmap the book.but the examiners questions us on many aspects given in the book.once or twice answers have popped up in my head,i have had aha experiences but how do i do it more and more effectively.so it requires many days of normal reading and reviewing.so in such a case how does one use the photo reading more effectively.How do i keep refining myself to ease things out.when i mean i tried ,i only mean that i am not being able to refine my studies further.