Defines the amount of white space, in points, that will appear before and after each paragraph, and also allows you to set the spacing between individual lines within that paragraph.
Tip: You should never leave empty paragraphs between text to give the effect of white space, instead you should set this using the spacing.
The ParaLineSpacing element corresponds to the "(Spacing) Line spacing" field, on the "Paragraph" sub-tab, on the "Style Definition" tab, of the Style object.