Open a PDF editor or document app that supports combining files
Select the option to merge, combine, or create a PDF from multiple files
Add the documents you want to include
Arrange the documents in the order you want them to appear
Confirm the page order and settings
Save or export the combined file as a single PDF
If needed, use a print-to-PDF option to convert each document and then merge them
Check the final PDF to make sure all pages are included correctly