I just tried to grade papers in PDF expert – and discovered one little detail that I had missed in all the conversation about using it. It seems that you can add comments ONLY if the student paper is in .pdf format – you can read .rtf and .doc papers just fine, but no amount of screen tapping will allow me to do anything but select text to copy.
So – I presume that Sam has students submit their papers as PDF files.
Or am I missing something here????