Section navigation is found on OC General pages using a 2-column template. On these pages, you'll notice that the left-hand content area is used for a navigation menu. This simple menu displays three levels of pages relative to where they are in the section. It is not meant to replace your site navigation but provide context to the user of where this page sits in your site tree.
As such, section navigation is restricted to the three levels of the site tree and does not have any expanding or call-to-action features. Different levels of pages are distinguished by an indent, and you can set the background, font, and hover colors in your theme.
A section begins at the top level of your site tree, and section navigation will always display three levels of pages, starting from the first child page of the section. We'll go through this using this example:
In this scenario, the First level page, as the parent page, will display the two direct child pages (both Second level pages) in the section navigation.
As the user progresses through each level, the section navigation will expand to include the second, third, and fourth level pages, and the page on which they're on will be bolded.
However, when the user reaches the Fifth level and Sixth level pages, they'll still only see levels 2-4 in the navigation.
Section navigation is only available for 2-column general pages and is often used with OC Landing Pages or featured sections.