With the export and import features, you can transfer annotations from one document to another, for example from an older version to a revised version of the same document. Annotations will be saved in files with the .paa file extension.
In the Annotations Sidebar, press the Annotation List Options button and select Export All.
First, Select the annotations you want to export. Then, in the Annotations Sidebar, press the Annotation List Options button and select Export Selection.
In the Annotations Sidebar, press the Annotation List Options button and select Import.