This post helps to add a text box to PDF using a free software and an online tool. You can adjust the size of text box, text style, etc.

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.

It's much easier to add text to a PDF than you may think, and it can be done on any device. Geber86/Getty Images ...

To add text, you have to call up the Markup toolbar, then tap a plus sign, then choose Text or Add Signature. But you can also highlight something already on the PDF, then tap and choose Highlight.

That said, free users can make certain changes to PDF files without a paid plan. As a free user, you can add comments, highlight sections, draw on a document, add new text, and sign documents.

This post helps you add watermark to PDF in Windows 11/10 computer using free tools. You can add text watermark and image watermark to PDF.