Delete all annotations in a document

2. Tap the Annotations tab:

3. Long press on any annotation in the list will bring up three options:
- Delete this annotation: deletes the selected annotation
- Delete all annotations on page: deletes all annotations on the page where selected annotation is on
- Delete all annotations in the document: deletes all annotations in the entire document

Note: you can always revert the changes by using Undo/Redo.