Apple MA261Z/A User Manual - Page 814

 Enable/Disable checkbox: Make sure there's a checkmark in this checkbox for the controls you want to use. This lets you add or remove color, saturation, or luminance from the criteria used to define a key.  Reset button: Click to restore the Color Range, Saturation, and Luminance controls to their default values. Shift-click the button to reset all three controls at once.  Color Range control: Allows you to fine-tune the range of color that you want to key on. Top handles Color gradient Bottom handles  Top handles: Let you select a larger or smaller range of colors that are keyed, based on the original colors you selected with the Select Color tool (the eyedropper). These handles correspond to the Width control in the Key on Chroma area of the filter's numeric controls.  Color gradient: Drag left or right within the color gradient to shift the overall hue of the color range you've set with the top set of handles. This corresponds to the Center On control in the Key on Chroma area of the filter's numeric controls.  Bottom handles: Allow you to define the tolerance of your key. These handles correspond to the Softness control in the Key on Chroma area of the filter's numeric controls. Use these handles to gently eliminate additional fringing from your key while attempting to preserve fine detail around the edges of your foreground subject.  Sat control: Allows you to adjust the degree and range of saturation that contributes to defining your key. The top and bottom handles work the same as those in the Color Range control. Drag left or right within the gradient to move all four handles simultaneously.  Luma control: Lets you adjust the degree and range of luminance that contributes to defining your key. The top and bottom handles work the same as those in the Color Range control. Drag left or right within the gradient to move all four handles simultaneously. Select Color button View Final/Matte/Source button Invert Selection button 814 Part IX Effects