You can split video footage that makes up a single Event into two Events. Splitting Events can help you keep your video organized in a way that makes sense to you.
To split an Event:
In the Event Library, click to select the Event you want to divide.
In the Event browser, select the clip that you want to become the first clip of the new Event.
Choose File > Split Event Before Selected Clip.
The Event is divided into two. The newly created Event appears in the Event Library and has the same name as the original Event, followed by a number. Double-click the name and type a new one.