Just like how you add inked signatures on a hard-paper document, you can also add an electronic signature to your PDF document in the Edge browser.

Learn how to add page numbers to PDF files using free online tools or PC software. You can set position, font, etc., for page numbering.

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

In other words, Adobe Reader won't let you add text. What you need is a program that's a little more accommodating, PDF-wise. Try Foxit Reader 4.3, which allows you to add text to any PDF.

How to Change the Font Size in a PDF Form Field. Portable Document Format, or PDF, documents allow users with different operating systems, fonts and programs to view a file.

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.

How the creator of a PDF file sets up her document determines the extent to which you can use Acrobat Reader's commenting tools to mark the file with notes about its content.

To see alt text in a completed PDF document, you'll need to use a screen reading app, which is an accessibility tool for visually impaired users.

You don’t have to save your scan in Notes, you can also scan directly into Files, where your document will automatically be saved as a PDF. Open Files on your iPhone (or iPad).