A Boolean value that indicates if the button is transparent.
- macOS 10.0+
When the value of this property is
YES, the button is transparent, when it is
NO, the button is not transparent. The default value is
Setting this property redraws the button if necessary. A transparent button tracks the mouse and sends its action, but doesn’t draw. A transparent button is useful for sensitizing an area on the screen so that an action gets sent to a target when the area receives a mouse click.