137Chapter 22 Adjust MenuPlease note: Tools that apply onlyto RAW images do not appear in themenus. Tools specific to RAW imagesare available in the Base AdjustmentsStep.LightLevels & CurvesThe Levels & Curves feature combinestwo of the most often used tonalenhancing features into one easy-to-use editor. The Levels & Curves featureenables you to adjust contrast, tonelevels (brightness), and color balance tomake maximum use of the tone rangeand color gamut offered by a particu-lar output device, such as a printer ormonitor.The Levels & Curves feature providesyou with controls to make tonal adjust-ments to specific portions of the activeimage’s tone range for either the entireimage or to specific color channels,making it possible to enhance theimage while preserving detail.Within the Levels & Curves dialog, youare provided with the option of firstselecting which channel, or portion ofcolors, that you want to affect. The Levels& Curves Editor begins by default editingall of the channels (Red, Green, and Blue)within the image simultaneously. If youwould like to change this, simply click onthe Channel pull-down Menu to selectone of individual channels, Red, Green,or Blue.Hint: You can access each of theseAdjust Menu
