title: Access coordinates of comment boxes on PDF
body: <p>I have developed a simple but effective tool to automate counting the instances of a specific statement in "sticky note" comment boxes. I'm using this fir marking student exam scripts. Users are using Ctrl+C,Ctrl+C to copy preexisting comments. However in some instances the comments paste directly on top of a preexisting comment. The script counts all but the user has not intended there to be a duplicate.
  I'm looking to find a way to access the coordinates of the comment boxes on the PDF so I can check for coordinate duplicates.
  Thanks in advance. </p>