However, these fields will change position when you add or remove text. So it is best to insert the page number field into a header or footer that has the same position and that is repeated on every page.
但是，在添加或删除文本时，这些字段将改变位置。因此，最好将页码字段插入到页眉或页脚中，它将重复出现在每个页面上的相同位置。