A line or block of text appearing at the top of each page, or section of a book, provides context and navigational cues to the reader. This recurring element often includes the title of the book, the chapter name, or the subject of the current page. As an example, in a history textbook, one page might show the book title on the left and the specific historical period covered on the right.
This element assists readers in maintaining their place within the publication and understanding the overall structure. Its consistent presence improves the usability of the book, facilitating quick orientation and navigation. Historically, its usage evolved from simple page numbering to more complex systems incorporating titles and chapter headings, thereby enhancing the reader’s experience.
