I'll tell you a way, provided that you use it to print instead of reading it in an electronic file. If there are 10 pages like this, you can print the first 9 pages. When the last page is finished, you can click the paging preview, then check the position of the last page, and select File-Print Area-Set Print Area. At this time, you can enter the page settings, header and footer-custom footer, enter the signature you want to display, and it's done. You can have a try.