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— Lock Row: Lets you choose to restrict your adjustment to affect all control points within a particular row of the rectangular Chroma-Luma graph. The height of this row is defined by the border width controls above. This is useful when you want to primarily adjust the hue of a range of colors, while making a small adjustment to lightness.
— Lock Region: Lets you choose to restrict your adjustment to affect all control points within a rectangular region surrounding the selected point. The is useful when you want to adjust a targeted region of color that corresponds to a well-defined feature of the image, such as a specifically colored hat, shirt, foliage, or skin tone. Smaller regions will make more specific adjustments than larger regions.
Smoothing Controls
If you’ve found that you’ve gone a bit too far with an adjustment and need to back off a little bit, the Smooth controls let you do so gradually, or start over if necessary.
The Smoothing controls
— Smooth Chroma: Each click of this button moves selected control points left or right, back towards their original position, bringing the hue of the adjusted colors closer and closer to the original hues of the image. Luma is unaffected.
— Reset Chroma: Resets the position of all selected control points to the original hues of those control points. Luma adjustments are unaffected.
— Smooth Luma: Each click of this button moves selected control points up or down, back towards their original position, bringing the luma of the adjusted colors closer and closer to the original luma of the image. Chroma is unaffected.
— Reset Luma: Resets the position of all selected control points to the original luma of those control points. Chroma adjustments are unaffected.