It is a rare user who creates only one-page files. If you’ll be creating books, catalogs, or any other multipage files, you need to know how to add pages to the existing file. Sometimes you’ll find that it is quite a problem. You certainly can split this file into separate pages; add new ones and then compile all pages into a
new multipage file. However, it is a long and inconvenient way, especially if you have to do it frequently. Still, you can add pages to the file with the help of ImageConverter Plus. More information is available at:
https://www.imageconverterplus.com/help-center/solutions/misc/incomplete-multipage-file/