iPhoto stores file information about each photo in your library, including its title, description, ratings, and keywords, as well as Exchangeable Image File (EXIF) information.
EXIF information includes the photo’s image size, the date and time it was taken, and the type of camera used, as well as important exposure information, such as the shutter speed, aperture, and ISO speed.
To show all information, including EXIF information:
Select a photo, and then click the Info button in the toolbar.
The Information pane appears. The photo’s EXIF information appears at the top.
Below the EXIF information, you can change the title, description, and rating by clicking the fields and typing new information.
If you select a different photo, its information appears here.
To hide the Information pane, click the Info button again.
Note: You can also show the Information pane by choosing View > Info.
To show title and rating information below photos:
Click to select Photos in the Source list.
Choose View, and then choose the information you want to view:
The information field you chose appears below your photos.
To hide this information, choose View, and then choose the information you want to hide.