What about <!--nextpage-->

WordPress allows for on-page “pagination”, i.e. the content author can insert the string <!--nextpage--> in a page’s content and WordPress will break the output there and instead allow the visitor to jump between “pages” of content.

The DocsMatter theme does not need, nor use, this HTML tag (comment, to be technically correct). It will silently discard it, and your content will be output in the content area. The content area in DocsMatter will allow the user to scroll the content if it doesn’t fit in the browser’s window.