It's very easy to enable comments in Roller, as you'll see in the next exercise.
Scroll down until you locate the Comments section, and make sure the Allow Comments for your weblog checkbox is checked:
Scroll down the page until you find the Update Weblog Settings button and click on it. Roller will show the Saved changes to weblog settings message inside a green box to confirm your changes. Now click on the Front Page link to see your weblog's front page:
The Comments link indicates that the comments feature is enabled in your weblog, and that there aren't any comments in that particular post.