Edit view allows you to apply various commands to change the orientation, lighting, and coloring of your photos. You can crop and rotate photos, improve photos that are over- or underexposed, and brighten the colors in photos that look washed out.
Use the Edit View
1 Click a photo thumbnail.
2 Click Edit.
iPhoto opens the edit view.
Click a thumbnail to edit other photos in your library. Which thumbnails appear depend on the source list selection when you entered edit view.
You can click
3 Click and drag the slider ...