Visually indicating on a user interface lengths, types of content, structure and current user location within a corpus of electronic content

A system comprising a hardware computing device coupled to a network and comprising at least one processor executing specific computer-executable instructions within a memory, wherein the system is configured to:

• convert a corpus of electronic content into a plurality of contiguous visual sections, wherein each visual section, in the plurality of visual sections, has a length, based on a length of the corresponding visual section in the corpus of electronic content, and a type of content and a structure;
• convert the corpus of electronic content or the plurality of visual sections into a plurality of contiguous thumbnails that correspond to the plurality of visual sections, wherein each thumbnail, in the plurality of thumbnails, is proportional in length to, and visually indicates a type of content and a structure of, a corresponding visual section, in the plurality of visual sections;
• display in a main viewing area of a user interface on an electronic reader to the user a viewable portion of the plurality of visual sections;
• display in a content strip tray of the user interface on the electronic reader to the user a viewable portion of the plurality of thumbnails;
• and
• display an accent effect over an accent portion, within the viewable portion of the plurality of thumbnails in the content strip tray, wherein the accent portion corresponds to the viewable portion of the plurality of visual sections in the main viewing area on the electronic reader.