Page header running header or running headline, is a header that appears on each standard page. Running heads do not usually appear on display pages such as title pages, or on other front or back matter. Running heads in a book typically consist of the title on the left-hand (verso) page, and the chapter title on the right-hand (recto) page; or the chapter title on the verso and subsection title/subhead on the recto, aiding the reader's navigation by showing what content exists within the two-page spread at hand. A special case of the latter is in dictionaries, whose running heads are called
Page (paper) lightness or darkness of the page is referred to as its colour. In book typography, a "cat hairbrush" refers to a master design of a page, designed by the graphic designer or the typographer of a book, that illustrates how similar pages in the same book can achieve a level of visual consistency. To help maintain the desired consistency, the typical page may employ a grid system. In a modern book, a page may contain a header and a footer. Pages may or may not be numbered, but most pages are. "...The first printed books had no title pages. As