iPhoto Adjustments - Levels
This article represents the first in a series where I will cover the image adjustment features of iPhoto. Many users do not make full use of the adjustments offered by iPhoto. With iPhoto 08, Apple has introduced image adjustments that were usually only previously found in professional image editing applications.
To display the image adjustments HUD (Head’s Up Display) in iPhoto, either of the following will work.
- Select a photo in the browser and click the ‘Edit’ button in the toolbar at the bottom, or
- Double click a photo in the browser and then select the ‘Edit’ button in the toolbar at the bottom
Levels
The Levels adjustment is displayed as an RGB (Red, Green, Blue) graph at the top of the adjustments HUD. Three sliders are provided underneath the graph that control the various tone levels of the image, the Lows, the Mids and the Highs. More advanced applications such as Aperture allow finer-grained control of each color channel; however, iPhoto only operates across all three channels at once. For most adjustments this restriction is perfectly fine.
