Create a new library
You can create new (empty) libraries, or you can create libraries from existing events. For example, you can select multiple events and copy them all to a single new library by choosing File > Copy Events to Library > New Library.
Create a library
Do one of the following:
To create an empty library: Choose File > New > Library, and navigate to a location on your hard disk where you want to save the library.
To create a library from existing events: Select one or more events in an existing library, and choose File > Copy Events to Library.
The new library appears in the Libraries list.