MenuStyle.setDefaultButtonStyle: Set the default Style for the creation of the Button activating pop-up Menus
MenuStyle.setDefaultTitleBarStyle: Set the default Style for the title Bar
MenuStyle.setDefaultButtonStyle(style)
MenuStyle.setDefaultTitleBarStyle(style)
style
A valid style: ButtonStyle for setDefaultButtonStyle and BarStyle for setDefaulttitleBarStyle.
See default Styles for more information