Section and Sub Section titles are achieved using Heading styles. It's important to note that Heading 1 is "off limits". It is used, by the system, to denote the Page Title. If you use it for other items on your page, you will create a problem with the Page Title. 

Current Heading Styles.....

Heading 1 - RESERVED - DO NOT USE

Heading 2 - (change)

Heading 3 - Section Heading

Heading 4 - Subsection Heading

Heading 5 - Unused

Heading 6 - Unused

Formatted - ??

Address - ??

In addition to Headings, there are also some "Styles" defined for certain special instances. For example, you may want to call out a quote on a page visually. Here's a list of the current Styles and some of the instances in which you might use them.

Current Styles...

Block Styles

Italic Title

Subtitle

In-Line Styles

Marker

Big

Small

Typewriter

Computer Code

Keyboard Phrase

Sample Text

Variable

Deleted Text

Inserted Text

Cited Work

Inline Quotation

Language: RTL

Language: LTR