The Screen Options tab at the top of pages in the WordPress admin section often goes unnoticed.
For some admins, that’s a good thing. For whatever reason, they don’t want users that have access to the backend playing around with it, and they hope it continues to go unnoticed.
For other admins, however, the very opposite is true. They actually WANT users to notice it. They feel it will help them do what they need to do more easily.