What does it mean to make a bookmark image?

Make pictures to put in labels for paper, electronics, plant leaves, and reading books

Generally used to inscribe book titles, usually affixed to the upper left corner of the cover of ancient books, sometimes with the volume times and inscribed person's name and mark where to read. Bookmarks are small sheets inserted into books to record reading progress. With the development of the Internet era, e-bookmarks have emerged to record reading progress and experiences.