PDF files have the option to ... Click, or click and drag, on your document to add a box with a colored border, and type your observations in it. Choose the Text Callout tool from the Drawing ...

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.

To add your signature to another spot or a subsequent PDF, click on the Sign icon and choose your saved signature. After you’ve added text and signed the PDF, save the file. You may want to give ...

The new Microsoft Edge Chromium browser includes a built-in inking tool that allows users to mark, highlight, draw, add text, and share text from the PDF file. In this post, I will share how you ...