When reviewing a document, you often need to draw attention to some important text the author can change later.
The PDF Viewer allows you to highlight, strikethrough, or underline text. You can also change the markup annotation properties (for example, add a comment to an annotation) or delete an annotation from a document.
You can change the markup annotation properties using the Annotation Properties dialog.
For example, to add a comment to a markup annotation:
Right-click the annotation and choose the Properties... item in the context menu;
This invokes the Annotation Properties dialog.
Type a text in the dialog's Comment text box.
To save changes, click OK.
The Annotation Properties dialog also allows you to change default settings for annotation color, opacity, subject, and author. The default settings are applied to newly created markups. To set new settings as the default, click Set As Default.