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.

This post will show you how to convert a PDF document to a fillable form in LibreOffice. A PDF can be used as a file to create a form with blank fields like text areas.

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.

Devon Delfino/Insider 3. Navigate to the page you want to add text to, and then select the Text icon (it looks like a "T" inside of a rectangle). A text box will then appear on the page.

EaseUS PDF Editor offers a complete set of PDF-editing tools to add edits to PDF files on your Mac quickly and easily, and it even converts scanned documents to text. Edit texts with format ...

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.