Support for multiple stylesheets in javadoc was added to OpenJDK 10 as JDK-8189217 [1].
I suggest to add a new configuration parameter "addstylesheet" to Maven JavaDoc Plugin. This value should passed as parameter "--add-stylesheet" to javadoc command line. There is a fork on github which implementes this feature [2]. See Oracle javadoc documentation for details about "--add-stylesheet" parameter [3]. [1] https://bugs.openjdk.java.net/browse/JDK-8189217 [2] https://github.com/schelldorfer/maven-javadoc-plugin/commit/2340e1b2c2b13f3198f054decebf846e529ebc53 <https://github.com/schelldorfer/maven-javadoc-plugin/commit/2340e1b2c2b13f3198f054decebf846e529ebc53> <https://github.com/schelldorfer/maven-javadoc-plugin/commit/2340e1b2c2b13f3198f054decebf846e529ebc53> [3] https://docs.oracle.com/javase/10/tools/javadoc.htm#JSWOR-GUID-9D532574-1CDB-4D30-99F3-A308DCAEE55F Regards, Martin
