All the events defined on a widget can be seen, edited, deleted or created through the Events panel once it is selected on the canvas.
The events panel shows all the events of the selected item grouped by User Events. Once you click on the option 'Add event' a dialog shows up. There, at the top left of it, you'll find the User Events' drop-down. That drop-down menu displays all the available event triggers that can be used to define an event for a widget. Select the desired trigger before defining any action.
To know more about event triggers check User Events.
All the interactions of a widget for a specific event trigger are displayed one on top of each other in the Events panel so you can easily see the order they will be executed:
To create a new interaction for a specific user event, click on the 'Add event' button on the events toolbar. For further information about creating interactions see Actions.
Every 'interaction' will consist of a possible condition and a set of actions displayed horizontally. The actions' execution will also have an order (from left to right), hence a particular action will not be executed until the one before finishes its execution:
The actions in the Events panel can be selected individually or as a group so you can copy, delete or order them.
To select an action separately, just click on it with the mouse left button. A grey border feedback will let you know when an action is selected.
To select a group of actions, click on them while holding the Control button.
You can define the order of the actions by drag and drop.