Vertical spreading

By default, when the vertical alignment is set to Spread any excess space is distributed equally between the paragraphs on the page. Where the page contains a single paragraph, any excess vertical space is distributed equally between the lines of that paragraph. Use the <page-properties> command if you need to override this behaviour.

The Consolidate space above and Consolidate space below options can be used to identify priority inter-paragraph spaces in your content at which vertical space is to distributed. These paragraph spaces will be allocated any extra space when vertically justifying the page.