Users should have the ability to highlight or mark up images and pdfs, with comments for each markup area.
Can you give more details about:
1. Where you would like to do this markup - mobile, web, desktop, etc.?
2. What types of annotations you'd like to create?
I just posted about something similar to this here but to give specifics about my requirements:
the comments would be on the web based preview in the form of sticky notes or drawn shapes (circling a particular region) that direct to the comments on the right side.
this functionality would be very useful not just for images, but for pdf engineering drawings, word docs, and excel spreadsheets (as long as there is only 1 sheet becasue only 1 is available in preview).
I agree, make sure there is connection between markup and comment (as described in my post)
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