First, Click "Post a comment"
Then, type your comment.
Select your profile.
- Google account : Only users that has signed into their Google accounts (Gmail or Google+) can comment through this profile.
- Same applies for LiveJournal, WordPress, Typepad, AIM.
- OpenID enables you to comment using any email address (Yahoo, Gmail, MSN or any other mail service)
- Name/URL requires you to type your name & your website link.
- Anonymous allows you comment without using any email address or URL.
Any of these steps might require a verification or confirmation of the email, either entering a code or a phrase.