Annotations are graphic markers and review remarks you can add to a document preview. You can place annotations in a document preview wherever you want them. For example, using annotations you can add a pushpin marker to a document preview, and enter a comment about the document right where the pushpin is placed. Each person's annotations appear in a unique color, making it easy to follow who said what.
Example 7-1 Associating Multiple Annotations
You can mark several disconnected sections of text and combine them into a single annotation. After adding the first mark, with the annotation box still open, use the selected tool to make additional marks on the same page (you can't join marks on multiple pages). After you add an annotation message and click Continue, the application draws a larger box around all the marks, and ties the single annotation message to all of them.