Automatically paginate posts by inserting the <!--nextpage--> Quicktag into WordPress posts, pages, or custom post type content.
Automatically paginate WordPress content by inserting the <!--nextpage--> Quicktag.
Option is provided to control what post types are automatically paginated (default is just
page, and any public custom post types.
Option is also provided to specify how many pages content should be broken out over, or how many words should be included per page.