Focusing on the verses, their positions on the page, and the entire page when memorizing helps to create an imprint of the page in the brain of the person memorizing it. This makes it possible for the memorizer to imagine the verses that he has already memorized and he can recall them quickly. As the memorizer recites, he/she hears him/herself and is able to reflect on the imprinted page or image of the verse they are reciting concurrently. With practice, the imprinted verses or pages can be as vivid as any other clear image in the memory of the memorizer.
The verses might be associated with a certain situation, or the beginning of a story, or a particular expression. Reading the meaning to distinguish which groups of verses belong together is another way to help improve the retention ability of the memorizer. Step 15 as you may recall was about sticking to one copy of the mushaf when memorizing. This step 16, however, is particularly about paying close attention to the pages or the verses for the sole purpose of retaining the image of the page in the memory. They go hand in hand. It will be impossible to maintain an imprint of the mushaf page in the mind if one keeps switching around between different copies of the Qur'aan.
Focusing on the verses as one memorizes and being able to retain the imprint of the verses or the page entails continuously looking at the memorized portion as you repeat the portion multiple times. Even after memorizing the said portion, the memorizer must make a habit of reviewing the portion while looking at the page. Reciting and reading the Qur'aan so as to consolidate what has already been memorized is pertinent to not forgetting the order and positions of the verses on the pages of the Qur'aan.
The source and main material used in preparing the content of this blog is the book, Ways of teaching the noble Qur'aan and memorizing it by Abu Abdrahman, Jamal ibn Ibrahim AlQirsh (طرائق تدريس القرآن الكريم وحفظه).