<\body> packages> First of all, provides several packages for customizing the behaviour of the standard styles: <\explain|> This package induces all numbers of environments (theorems, remarks, equations, figures, ) to be prefixed by the current section number. It is usually used in combination with the style (for long articles) and the style (for books with long chapters). <\explain|> By default, uses ``American style numbering''. This means that the same counter is used for numbering similar environments like theorem and proposition. In other words, a remark following ``Theorem 3'' will be numbered ``Remark 4''. If you want each environment to have its individual counter, then you should enable ``European style numbering'', by selecting the package. <\explain|> This package may be used in order to switch back to American style numbering in the case when a third parties style file enforces European style numbering. <\explain|> This is an experimental package. By default, items in unnumbered lists or enumerations take no arguments and items in descriptions one argument. When using the package, they take an optional additional argument with the body of the item. <\explain|> This is an experimental package. By default, sectional tags only take a title argument. When using the package, they take an optional additional argument with the body of the section. Moreover, the environment for recursive sections is provided. <\explain|> This package may be used in order to obtain an alternative rendering of interactive sessions. The rendering is designed to be nice for interactive use, although less adequate for printing. In addition to these packages, and the many packages for internal use, also provides a few personal example style packages , and and several style packages for use in combination with external plug-ins (, , , ). >