Portable document format (PDF) files remain a popular choice for business documents ranging from contracts and forms to manuals and reports, so there's a good chance you need to open them often.

You can combine multiple PDF files into one document using basic software. Mac users can use the Preview app to combine their PDF files into one document. PC users ...

Converting images into PDF files is practical if you want to merge several images into one PDF or save a single image professionally. Whether for printing, sending, or archiving — the PDF format is ...