Commenting
Commenting in Word is a great way for collaborators to communicate questions, feedback, and other comments to each other directly in the document. A comment can be added to a particular passage or section, and others can respond to it by replying directly to the comment. Comments appear in an expanded right-hand margin and can be deleted or hidden at any time.
To add a comment, select the Review tab from the ribbon and go to the Comments section. Place your insertion point (the blinking line) in the document where you want your comment to be or select the specific text. Then, from the Comments section, click New Comment.
The following screenshot shows the Comments section of the Review tab:
You will see a colored line drawn from the spot of your insertion point to the now expanded right margin, where there will be a balloon with space to add your comment. The insertion point should appear in the balloon...