Feel free to skip this if you're a commenting guru already.
1. Below the post click "Post a Comment" (It should be in pink). If you don't see that, click on the word "Comment" next to my name and time below the post.
2. This should bring up a comment window of some kind. Once you type in what you want to say you have to choose an identity. If you want to be Batman, that's fine, but I prefer to know your real identity. I get it, though, if you want to keep it a secret.
3. Your best bet for "choosing an identity" is to select the "Name/URL" option. This is for ANYONE. You don't need a Google account or even a webpage to use this. When you choose this option, just fill in your name in the name space. The URL is optional, but if you have a webpage or blog you want to link to, just put the URL in that field and your name in the comment will become a link to your page.
Then you click "Publish Your Comment" and that's all there is to it!
4. Those with a Google account can "Sign in with Google" or something. Click that option and follow the steps. It's very straight forward.