Sometimes, you have a few pages in a PDF that you want to transfer into another PDF. Instead of rescanning the pictures, you can simply edit the PDF document by adding the pages you need. If you scan the documents again, you are going to have to turn on the scanner and pay more electricity bills. You actually don't need to use any software to add pages in a PDF document.
In Windows 10, you can merge the PDF for free by using the Print command. Let's learn the ways to add pages to PDF on Windows 10.