If you ever find yourself with the need to combine several PDFs into one single file, you may be immediately frustrated: It's not immediately obvious how to achieve what you're trying to do ...

Different formats can also make managing several documents cumbersome. Combining these documents into a single PDF file may be helpful for personal or professional use, to deliver simplified, ...

You're able to build PDFs in the Preview tool too: As long as you have a PDF open in Preview, you can drag any file type into the table of contents sidebar on the left to add it as an extra page.