Start by picking a narrow range, the center is initially selected by the Hue Selector Dropdown but you can shift it. While viewing the selection with a narrow range you can target your colors and then expand the range to capture more. Falloff controls how fast the mask ends.

Operates similar to the hue control letting you narrow your selection to just a certain luminosity range.

Adjusts the tail of the selection in terms of how soft the edge of the masks are.

This protects colors that are near neutral from being effected by the color shaping controls to follow, putting more of the impact on stronger chroma colors.

Increases or decreases saturation for you slice selection

Increases or decreases the relative brightness/luminosity of the selected hue. Think color wheel as a sphere.

Bends the selected hues toward a new hue…

Either collects the selection and bends them towards the hue center, or pushes them away from the hue center. This operation happens before the Hue Rotation control

Makes changes to the part of the image you didn’t select to make your selection stand out by lowering the relative luminosity.

Instead of selecting a hue, this does something fancy and makes a density based selection… Good for doing a full wash of changes on the image.

This tells the chroma weighting control to effect how the masks are defined.

Allows you to push your selection to other nodes, just make sure you turn off Alpha effects blending in your node settings.