Final answer:
To add a comment to selected text, highlight the text and click on 'New Comment' in the tools ribbon. Type your comment in the comment box that appears in the margin.
Step-by-step explanation:
To add a comment to selected text, you can use the following steps:
- Highlight the word, sentence, or phrase you want to comment on.
- Click on 'New Comment' in the tools ribbon.
- Type your comment in the comment box that appears in the margin.