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.

PDF documents should contain alt text for each image, to make the document more accessible to visually impaired users. If you're still editing or creating a PDF, you can see, edit, and create alt ...

Although rare, when attempting to save a file in PDF format the PDF text content in an Adobe PDF file disappears. It occurs mostly in fillable forms where the text you enter disappears right after ...