Underneath every post or entry there is an active link called comments and it generally has a number in front of it. If you want to comment or read everyone else’s comments, click on it. A new screen will pop up with all comments listed in the left column. In the right hand column there is a box that you can type into--under the place it says "Leave your comment." Type your comment. Underneath the box you need to "Choose an identity." 1. You can register for your own blogger identity for free. This requires setting up an account and selecting a username and password. 2. You can choose "other". This will register the non-blogger username and website of your choice. 3. You can choose to be "anonymous" and not register any name or website. This is the easiest option. And if you would like to leave your name at the bottom of your comment Bob can read who it is from. Finally, select the orange button to "post your comment" or the blue button to "Preview" it before posting the comment.
Feel free to practice. If your practice comments get too messy, as the blog administrator, I can always clean them up for you.