For all of you who have been trying to figure this out. (All two of you.)
1. Click on the "[#] Comments" at the bottom of the post.
2. Write your comment in the box.
3. Choose which option best fits you: Google Blogger/Other/Anonymous. Click on the circle next to the one you choose.
3a. If you do not have a blog site with google, choose "Other."
3b. If you choose "Other" and you don't have a website, that's OK. Just put your name, and leave website blank.
4. Click on the "Publish" button.