I found unusual marginalia in three [letters] that, if genuine, would shift my interpretation of strike leadership. I’…
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 simply marks specific words or sentences with a colored background, drawing attention to them without adding new content. A text box comment, however, allows you to type new information or explanations directly onto the page. You can move and resize text boxes, making them useful for longer notes that don't fit in the margin.
You should sanitize a PDF to remove hidden information, including comments and markups, that you might not want others to see. Comments are a separate layer and can reveal your review notes or private thoughts. Sanitizing ensures that only the final, clean document is shared, protecting your privacy and preventing accidental information leaks.
If you want to draw a circle around an image, you should use one of the 'drawing markup' tools. These tools let you add shapes like circles, rectangles, or lines directly onto the PDF page to highlight specific areas or elements.