JavaFX add button (icon HELP) to the title Stage

Issue

Tell me please, how add button HELP to the title Stage with JavaFX. I'm use Linux.

Solution

Preface:

You can't modify the title bar of Stages in JavaFX.

Workaround solution:

Build your own title bar, add it to top of your Scene, and remove the original title bar.

1. Use BorderPane as root node of your Scene.
2. Create your title bar in the "top" Part of the BorderPane.
3. Remove the original Stage title bar with stage.initStyle(StageStyle.UNDECORATED);.

Answered By - David Weber