Netbeans Maven Lexer Fontscolors

Hello,

i am currently migrating from plane Netbeans modules to Netbeans Maven modules. First, I want to migrate a lexer module that perfectly worked previously. However, when I run the Maven compiled app, I don't see the defined lexer language in the Options dialog of my app (Tools->Options->Fonts & colors). From my previous experience I know that there must be everything absolutely correct or I don't see anything. Within my Maven module, there is a layer.xml file (correctly defined in the manifest file) that contains the reference to my FontAndColors.xml file. However, when I build with maven, the content of the layr.xml seems not to be merged with the generated layer.xml content. I have two questions.
(i) Is there already an annotation available to define the FontAndColors.xml position and any documentation for it?
(ii) if not, how can I tell Maven to merge the content of my layer.xml with its generated content?
Thanks a lot.

Regards,
Klaus