I inherited a long complaint thread with recordings and emails and I need clear, action-ready annotations by [deadline…
Open your PDF file in Adobe Acrobat.
Click the Comment button in the toolbar to display the commenting tools.
Select the annotation tool you want to use, such as Note, Highlight, Text Box, or Draw.
Click on the PDF page where you want to add your comment or annotation.
Type your comment or draw your annotation as needed.
Click away from the annotation or press Escape to save your comment or annotation.
You can use multiple annotation types in one session, such as highlighting text and adding sticky notes for detailed feedback.
This runs in the Acrobat app - there is no separate API for this task.
Highlighting text is best for quickly marking important words or sentences to draw attention to them, like using a yellow marker. A text box, or a callout, is used when you need to write a longer explanation, ask a question, or provide detailed feedback that doesn't fit in a simple highlight. Both help in reviewing, but a text box gives more space for your thoughts, making it useful for complex feedback.
Sanitizing a PDF is crucial because comments and markups are added as a separate layer, not permanently merged with the document. If you don't sanitize, these review notes, private thoughts, or even deleted text could still be recovered by others, leading to accidental information leaks. Using 'Protect > Sanitize' ensures that all hidden data, including comments, is completely removed, making your 'final' document truly clean and secure before you send it out.
Drawing markup tools in Acrobat let you add shapes, lines, arrows, and freehand drawings directly onto your PDF. You should use them when you need to visually point out areas in images, diagrams, or specific parts of the page that text comments might not clearly address. For example, you can circle a problematic image, draw an arrow to a section needing attention, or cross out a part of a diagram. They are very useful for visual feedback and instructions.