I found a couple undocumented tags for use in JavaFX classes:
- @profile – use this tag in the class comment to document the profile your class falls under (common, desktop, mobile)
- @defaultvalue – use this tag in property documentation to fill in the Default Value column in the generated documentation
For example, the following markup
produces this in the generated docs
Any more hidden gems out there waiting for discovery?
Posted by Nathan Erwin 
