Help:Template
Help page
To use a template in any document reference the template and separate arguments with pipes |.
As an example you can create a box to emphasize an important information
{{Important|It is not possible to run `makepkg` as root!}}
Which will give this result in the final document
Templates are helpers - they are not the document - so don't over do it.
You can utilize different boxtypes setting both the header and the content