All design is based on a structural system. These systems or frameworks can be broken down into eight mayor variations with a infinite variety of compositions within each system. Once essential visual organization system are understood, the designer can fluidly organize words or images within a structure, combination of structure, or create a variation of a structure. Typographic organization is complex because the elements are dependent on communication in order to fuction. Additional criteria such as hierarchy, order of reading, legibility, and contrast come into play.