Hi, Is the Javadoc tool used to build JavaFX documentation not from the JDK used to build JavaFX ?
If you view the javafx.event.Event 'Uses' webpage [1] source, you will see the comment: <!-- Generated by javadoc (1.8.0) on Tue Feb 10 11:39:35 PST 2015 --> So it looks like the documentation is built using jdk1.8.0 while JavaFX itself is built using jdk1.8.0_40 [2]. The alignment in the concerned webpage is messed up. (Description column is all the way to the right and its width is very small). When I built the documentation locally using jdk1.8.0_40 the webpage is displayed properly. Seems like there was some Javadoc bug in 1.8.0 which was resolved in some subsequent releases. [1] : https://docs.oracle.com/javase/8/javafx/api/javafx/event/class-use/Event.html [2] : https://bugs.openjdk.java.net/browse/JDK-8097930 -- Anirvan