"HTML Tag" as shown below.

You will see the following dialog box after you follow the above instructions:

You will enter each individual tag you
want to add to your page in these boxes. As you can see here we have placed
the HTML tag for centering an item in this box. To close that center tag
you would need to insert a new tag into your document. You can not combine
both an open and a close tag in this one box. You will need to insert a
new tag for each individual tag you wish to insert.
Click
on the arrow to continue with the Composer Tutorial.