<\body> The provides tags for customizing the headers and footers. The customization is based on the idea that we may specify a for every page. This page text can for instance be a running title or the name of the current section. The page text may depend on the parity of a page and appear in a different way for special pages like starts of new chapters. The following tags control the physical layout of different types of pages: <\explain|> This tag, with the page text as its only argument, specifies the layout of the first page of a new chapter or section. <\explain|> Similar to , but for the layout of ordinary odd pages. <\explain|> Similar to , but for the layout of ordinary even pages. The following tags control the logical header-related actions to be undertaken, when specifying a title, an author, or when starting a new section. <\explain|> A tag with a ``title argument'' which is used at the specification of the document title. <\explain|> A tag with an ``author argument'' which is used at the specification of the document author. <\explain|> A tag with a ``section name argument'' which is used at the start of each new primary section ( for book style, or for article style). <\explain|> A tag with a ``section name argument'' which is used at the start of each new secondary section ( for book style, or for article style). <\initial> <\collection>