They can use that understanding when trying to navigate to parts of the document that interest them. Maps can help navigation By using clickable image maps, such that when readers click on the representation of a particular page in the document they are immediately taken there, allow them to navigate directly. This gives them a better feeling for the document, more like a physical item like a book with pages than an endless scroll of paper. It is important that the maps provide design that makes the organization clear. For example, the use of grouping and naming of pages in the map can reinforce the relationship between various pages.
Lists are a simple form of map.
They rely on order and the words in the list itself to provide the information. The organization of a list is very simple. These can range from simple trees, to constellations and neighborhoods. The maps that are produced as part of the Trellix 1.0 product are a good example of 2-D maps.