Because you are likely to accumulate a large number of images, it is imperative that you keep them organized and that you use iPhoto's labeling tools to help you identify your photos so you can find them when you need them, such as when you create albums or do projects. There are several kinds of information, including image information and keywords.
To view an image's label information, select it in the Content pane and open the Information pane (see Figure 21.4).