The comments can be easily deleted, just right-click on the comments in the PDF document. The menu will appear, click delete. This will delete the comment from the document. You can also delete the comment by clicking it on the right side of the Acrobat window. You will see three dots on the comment, click the dots to bring up the menu, and from the menu click Delete. The comment will be deleted without asking for confirmation so be sure that you want to de