You may find this difficult to believe, but this approach helps me find bugs and repetition.<p>I have noticed every page I scroll causes a comprehensive loss of around 90%, so in reading something that is 10 pagefuls long, I might only be able to produce a tiny part of the program.<p>Your milage may vary.<p>I find not scrolling, and just moving my eyes, I rapidly absorb the program, and I find most bugs just by reading the code. This practice is absolutely impossible for me if I have to scroll very far and made difficult by scrolling at all.<p>I do not know how to do this except to write horizontally.