One of the new functions of iPhoto 09 are Faces. When you select the Faces in the menu bar on the left you will see a cork board with the thumbnails of faces that iPhoto has identified in your library. The default thumbnail photo, or the key photo, is not always the best choice, so you’d like to change it.

There are two ways of doing this. Firstly, you can click on a little “i” icon in the bottom right corner of the photo, then skim through the photos until you find the one you like. Click on it and your new key photo will be set.

The other and easier way of doing this is simply to skim through the images (slide your mouse pointer over the thumbnail) while on the cork board, and once you see the photo you’d like to set as a key, just hit space bar. The new key photo is set. The same applies for the Events view thumbnails.

An extra tip – if you are skimming through the Faces, hold down the Option button, this will show you the entire photo, not only the face.