Subheads
Subheads are great — often essential — ways to break up a long story to make it more web-friendly. In HTML, they are called headers.
To make a subhead in your post, simply wrap the subhead title in <h3> and </h3> tags like this:
<h3>Section three<h3>
Section three
Why h3?
Headers come in a variety of sizes, from h1 all the way down to h6. Usually h1 is used for the page’s main title. Then h2 is used for a second-level of headings — and on your Movable Type blog, post titles (headlines) are tagged as h2s. Thus if you’re dividing a post up into smaller sections with subheads, h3 would be the proper level of header to use.
Basically, using h3 means that the sections marked by these subheads are all subsections of a larger section that is marked by an h2.