How to add a comment?

Thank you my friend who commented via email
You have asked me how to add a comment
In any blog , after a post( it is like one small article ) , a small label with text "comment" appear . It is clickable , that mean when you click it some other page or document may open.In a blog setting , once you click on"comment" , a text box will appear ( a blank area where you can type text) just below the post. You can type the comment in that area and then press the button "Post Comment". If you want to see how it appear in the blog before posting, use "preview" button"