Yari is making a great point – looking at your manuscript (ms) in a different format and even on a different device can help you spot things you may want to change and things you have to change like errors. I like viewing my ms as a pdf on my tablet. Even going from computer screen to tablet, I notice different things. And I always recommend to my clients to print out their ms and read it that way as well (one of the last edits I do). I also read out loud. Another very helpful editing tool.