Originally Posted by Mono
I think, PeterX meant, that he might look at the problem (maybe do the programming). He (or any) programmer needs the definition of the task.
One probably can read annotations and text scribles, but we (users) have to say, what should be the output.
I don't think so. Anyway...
Highlighting text and having the highlighted text added as a note to the PDF file is all we need. This is a standard functionality for many PDFs programs. Exporting the comments can be handled separately on the desktop side.