9 STEPS
1. The first step is to open your desired Google Doc and click File.
2. To see the history of group comments (even those that have been resolved) Click Open comment history (⌘+Option+Shift+A) in the top right hand corner of the screen.
3. Scroll down and click Open comment history (⌘+Option+Shift+A)
4. Click Open comment history (⌘+Option+Shift+A). I can now scroll through and see all comments made on the document. To bring back a document, I can click "re-open" in the top right hand corner of each comment's card.
5. Another way to review group contributions is through Version History. With your mouse, click File, then hover Version history
6. Click see version history
7. The Version History of all edits made on the document can now be seen on the right. I can so who edited the document, when, and exactly what they added or deleted by clicking on each date and time.
8. Scroll down and click Back
9. That's it. You're done.