Book eyebrows are called in Chinese vertical books.

The blank area above the left and right line of text is usually used to write the chapter title, author's name, book title and other information. When designing book eyebrows, we need to consider the balance, beauty and readability of the whole layout, as well as the coordination with the theme and atmosphere of the book.

In traditional books, book eyebrows are often combined with binding, paper type, font and other factors to produce unique visual effects. In the digital age, the design of book eyebrows also needs to consider the display effect and user experience of electronic screens.

Whether it is a traditional paper book or an e-book, book eyebrows are important elements to convey basic information of books, improve visual effects and increase reading experience.