The Edit Current Event button displays a dialog that lets you edit the properties of the selected event. The dialog depends on the type of event you've selected. The controls in the edit dialogs are the same as those in the dialog you use to add that type of event.
The top field in each event dialog is an editable label field. If the field is left blank, the event uses its assigned label. If you enter an event name, the Video Post Queue displays your event name in the field.