<\body> The general layout of a document is mainly modified by setting the appropriate environment variables for and . For instance, by including the following lines in your style file, you can set the page size to and the left and right margins to : <\tm-fragment> <\inactive*> It should be noticed that the environment variables for page layout are quite different in and /. In order to make it easier to adapt style files to , we have therefore provided the package, which emulates the environment variables from /. Typically, this allows you determine the global layout by lines like <\tm-fragment> <\inactive*> > > > We notice that macros which return lengths are considered as themselves. In the case of the / emulation package, we actually all lengths to be macros. The page headers and footers are usually not determined by global environment variables or macros, since they may change when a new chapter or section is started. Instead, provides the call-back macros , , and . These macros are called when the document title or author are specified or when a new primary or secondary section is started (primary sections are typically chapters in books, or sections in articles). For instance, the following redefinition makes the principal section name appear on even pages, together with the current page number and a wide underline. <\tm-fragment> >>>>>>>>>