The font of the cover does not necessarily use the font in the font library. According to the understanding of book content and the characteristics of book content and readers, the cover designer's design concept includes the font and font characteristics of book titles. In most cases, the software font library is often used, and then influential experts or leaders are invited to inscribe, or the responsible cover designer designs the fonts himself. The least commonly used are some special publications, which are composed of scanned text and split and edited.