To add comments:
Highlight some text, or place the insertion point where you want the comment to appear.
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From the Review tab, click the New Comment command.
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Type your comment. When you're done, you can close the comment box by pressing the Esc key or by clicking anywhere outside the comment box.
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To delete comments:
Select the comment you want to delete.
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From the Review tab, click the Delete command.
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The comment will be deleted.
To delete all comments, click the Delete drop-down arrow and select Delete All Comments in Document.
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