<\body> The contains several helper macros which can (should) be used when customizing the rendering of section titles: <\explain> <|explain> These macros should be used for rendering ``short section titles'', for which the section body starts immediately at the right of the title. Usually, titles of paragraphs and subparagraphs are rendered in a short fashion, while the other section titles span over the entire width of a paragraph. <\explain> <|explain> These macros should be used for rendering ``normal left-aligned section titles''. Such titles span over the entire paragraph width. <\explain> <|explain> These macros should be used for rendering ``normal centered section titles''. Such titles span over the entire paragraph width.