Merge And Certify Files

• Turn on 'Preserve Bookmarks' before combining. This makes each original file a top-level bookmark.
• Drag thumbnails to order your files correctly. The combined PDF will follow this order.
• After combining, use continuous page numbers if your original files had separate numbering.

This can happen if there's a problem with the structure of your original files. Acrobat might struggle to process them correctly. To fix this, try opening each original file and using 'Save As' to create a fresh copy. Then, combine these new copies. You can also try adding files one by one to see which one might be causing the issue.

The 'Combine PDF' API is a way to automate the process of merging files into a single PDF using code. You should use it when you need to combine many files regularly, or as part of a larger automated workflow. It allows you to combine up to 20 files and even specify which pages from each file to include.

No, combining files rarely makes the new PDF smaller. Usually, the size stays about the same or even gets a little bigger. If you need a smaller file, you should compress the PDF after you have combined all the documents. Acrobat has a separate feature for compressing PDFs to reduce their file size.

• Understand that this happens because your original files already had their own page numbers.
• After combining, you can add new, continuous page numbers to the entire merged PDF.
• Look for the 'Edit PDF' tool in Acrobat, then find options to add headers and footers, which include page numbering. Choose to overwrite existing page numbers.