Click inside the text field and type your note. Add as many Sticky Notes as you desire. Save the PDF document when you are finished adding notes by pressing "Ctrl-S" simultaneously.

Adding Text Notes to a PDF Select the Text Box tool from the Drawing Markups panel. Click, or click and drag, on your document to add a box with a colored border, and type your observations in it.

Add Notes: Place comments in the form of sticky notes directly on the PDF. Shapes: This lets you add pre-made shapes like rectangles, circles, and arrows to draw attention to specific areas.