Graphical user interfaces for computer display devices include a page bar control element that allows a user to easily and quickly navigate among the pages of a multiple page electronic document and/or among the pages of a plurality of electronic documents. In some examples, the page bar control element displayed on the computer system provides a visual representation of a multiple pages of the document(s), wherein the visual representation includes several tabs or markers, each marker representing one or more pages of the document(s). In some examples, the markers are rendered in colors that enable quick identification of the current page and/or the page being viewed as well as pages viewed in a riffling action. The page bar control element also may include a visual “flag” that helps users quickly locate text that they have previously flagged or that the system has automatically flagged for them.