<\body> The and menus contain the following useful macros for common annotations. You should use them whenever appropriate. <\explain|> This macro is used in order to indicate a macro or a function like . <\explain|> This macro should be used in order to indicate macro arguments such as . <\explain|> This macro is used for the indication of environment variables such as . <\explain|> This macro is used in order to indicate a length such as . <\explain|> This macro indicates the name of a style file or package like . <\explain|> This macro indicates the name of a package like . <\explain|> This macro indicates the name of a like . <\initial> <\collection>