Organize Photo Events in iPhoto
Snow Leopard’s iPhoto lets you organize your images by event, which is essentially a group of pictures that you shot or downloaded at the same time. iPhoto figures that those images belong together (which is usually a pretty safe assumption).
To rename an Event, click the Events entry under the Library heading in the Source list to display your Events in the Viewer; then click the existing Event name in the caption underneath the thumbnail. A text box appears in which you can type a new name; click Return to update the Event.
When you move your mouse cursor over an Event thumbnail in the Viewer, iPhoto displays the date range when the images were taken, as well as the total number of images in the Event. Ah, but things get really cool when you move your mouse cursor back and forth over an Event with many images: The thumbnail animates and displays all the images in the Event!
Notice that i-in-a-circle that appears when you hover your mouse cursor over an Event thumbnail? Click it to display the location where the shot was taken, using the Places feature.
Decided to merge those Prom Event pictures with your daughter’s Graduation Event? No problem! You could drag one Event thumbnail on top of another. Alternatively, click the Events entry under the Library heading in the Source list to display your Events and then hold down Command while you click the Events that you want to merge. Click the Merge button in the toolbar at the bottom of the window, or click Events→Merge Events. Click Merge in the confirmation dialog that appears.
While organizing, you can create a brand-new empty Event by clicking Events→Create Event. Feel free to drag photos from albums, other Events, or your Photo library into your new Event.