Need to add text to a PDF that doesn't support editing? No problem -- and no extra software required.

How to Save Changes to a PDF Form. Adobe Acrobat enables authors to create PDF files, such as product order forms or personal information forms, that Adobe Reader users can fill out.

Like the GIF (that's Graphics Interchange Format), the PDF (Portable Document Format) has survived and flourished through the digital age. That's partly because of its versatility: It's the go-to ...

Need to edit a PDF document but don’t want to pay for the more expensive Adobe editors? You can add text to and sign a PDF with just the free Reader program.