Just below the Source list, at the left side of the iPhoto window, you’ll find a display of basic information about all the photos in your collection. The information displayed in this Info pane changes depending on what you’ve selected in the photo viewing area (see Figure 7-8).
If you don’t see the photo information described here, you may have the Info pane hidden. Click the button in the main iPhoto window to reveal the info. Click it twice to reveal the Comments field described on page 116.
When a single photo is selected, iPhoto displays that picture’s creation date, dimensions (in pixels), and file size. Beneath that you’ll see the name of the Music track that will play when the currently selected Photo Library or album presents a slideshow (see Chapter 9).
When multiple photos are selected, you see the range of their creation dates, plus how many are selected and how much disk space those photos occupy.
When no photos are selected, the Info area displays the total number of pictures in your Photo Library, the grand total file size of your library, and a range of creation dates taking in all your photos. This last statistic is really pretty cool, in that it amounts to a running stopwatch that measures the span of your interest in digital photography (as of the iPhoto era, anyway).
The file size info can be extremely useful when creating backups, ...