User configuration which is utilized at the project level are controlled with the
 ${project.home}/maven.properties file.

Plugin configuration

 The configuration of plugins is of the same form as the maven {{{plugin-descriptors}plugin descriptors}}
 themselves:

+-----+
<plugins>
  <plugin>
   <id>xdoc</id>
   <version>1.0</version>
   <parameters>
     <parameter>
       <name>theme</name>