Systems and methods of visually indicating on a user interface of an electronic reader the lengths, types of content, structure and current location of a user within a corpus of electronic content are presented. The corpus of electronic content may be converted into contiguous visual sections and contiguous thumbnails (of the visual sections). The user interface includes a content strip tray displaying a viewable portion of the thumbnails and a main viewing area displaying a viewable portion of the visual sections. An accent effect may be displayed over the viewable portion of the thumbnails that corresponds with the viewable portion of the visual sections currently displayed in the main viewing area to indicate a location of the user in the electronic content. Additionally, headers, location markers, assignments and notes may be displayed on the viewable portion of the thumbnails.