Secondary Color Correction Primer - The Art and Technique of Digital Color Correction - page 179

Fig. 5.25
picker modes. The + button allows you to add new values to the range.
The—button allows you to deselect values from the range. The + S and -S
buttons do the same thing with softness.
Experiment with these buttons for a while to see how much of the
canopy you can select and how little of the rest of the picture is included
in the selection. Command-Z or Control-Z will work to undo simple mis-
takes or clicks.
The other things we want to experiment with are the sliders to the
right of the hue, saturation, and luminance bars. These allow you to
adjust the selected values numerically.
Try adjusting the Center slider to the right of the hue bar, “focusing
it” back and forth to optimize the best selection of pixels. Then adjust
the Width slider until you start to see parts of the barn buildings being
selected. Then adjust the symmetry and softness sliders. Watching the
white outline on the Hue bar gives a good idea about what these sliders
are doing in their selections.
Next to the Saturation bar (the second colored bar under hue), adjust
the Low and High sliders. On the low side, the adjustments start to pick
up more of the barn buildings because we are telling Resolve to include
more low saturation pixels. Because the barn buildings are mostly white,
they have some blue in them but are mostly desaturated. By adjusting
the Low slider, we are picking up pixels with values that are less desatu-
rated. Adjusting the High slider, we can go all the way to the top of the
range because there are no other highly saturated blue pixels in the
image. We might as well leave this slider as high as it can go to ensure