Use the ‘add photos’ link on the event page to add photos to an event. This link gives you the option to upload new photos for that event or to associate existing photos with that event.
You can also tag a photo or an album with an event using the Event: ‘edit’ link. This link is below each photo on its individual photo page and in Album Details when organizing an album.
You may also add a photo to an Event, by clicking on the ‘add photos’ link or you may browse existing photos located via the Event itself.