Action is the interactive interface to make operations from widget. It can be configured from the "Actions" Property. There are five types of actions that can be associated with any type of widget:
In run mode, you can invoke the actions by right clicking a widget and select from
the "Actions" submenu. If you selected the option "Hook the first action to the mouse click event on widget" in
the actions config dialog, you can simply invoke the first configured action by clicking the widget.