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.

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.

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.

If you're looking for a quick way to edit or sign a PDF document, there are free and easy-to-use tools for iOS, Windows, and Android devices.

Add Text to Fillable PDFs To get started with adding text to a PDF on your Mac, first check whether the document already has editable fields, a practice that's especially common with business forms.

PDF files are usually non-editable. However, with an efficient editing tool, you can effortlessly add text to your PDF file. Read the full guide to know reliable methods to do so.

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.

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.

If you want to extract highlighted text from PDF file as a plain text file, then this post covers some good free PDF Highlight Extractor software to do that.