This is a small guide on how to set up your project's banner to support the book-class. This guide assumes that your project's banner is based on ((WPBannerMeta)) and the ((class mask)). If your banner is not based on this, leave a message on the talk page of your banner and at Template talk:WPBannerMeta for help on how to convert your banner.
If your project's actual banner [not a redirected version] is located at, for example Template:WPAstronomy, then go at Template:WPAstronomy/class (class with a lowercase c). This is your class mask.
This page should look a bit like
((class mask|(({class|))} |topic=Astronomy |FQS=yes |redirect=yes ))
Two simple steps:
<noinclude>/templatepage</noinclude>
to the template call. This allows the subpage to provide appropriate documentation.|book=yes
at the bottomFor example:
((class mask<noinclude>/templatepage</noinclude> | (({class|))} |topic=Astronomy |FQS=yes |redirect=yes |book=yes ))
and the book-class will be supported. You will still need to create the relevant categories, such as Category:Book-Class Astronomy articles.