Book layout is the craft of blending the material, aesthetic, format, structure, and arrangement of the diverse elements of a book into a unified entity. As Jan Tschichold stated, "methods and principles that cannot be improved upon have evolved over centuries. To create flawless books, it is essential to revive and implement these principles." The front matter, or preliminary pages, constitutes the opening segment of a book, typically the briefest part in terms of page count. While every page is accounted for, neither folios nor page numbers are indicated or printed on display pages or blank pages.