How do I leave comments on a blog?

If someone has comments enabled on his or her blog, then you can usually find a "comments" link at the end of each post.
If you click this link, you will go to the comment posting page.
On the right hand side of the page is the space for you to enter your comment. Beneath that are the identity options.

The options are these:
*Blogger username: Your display name will appear, along with a link to your profile and your photo (if you have one).
*Other: You can enter your name and a link to your website, without having to have a Blogger account.
*Anonymous: No identifying information is displayed. The comment is credited to "Anonymous" without a link.

Note: The one in red is easy and will not reveal your identity.
One click on the "Login and publish" block and your done.
For more details click here.

Note: You may click on a photo in a post for larger veiw.