The Luma grid is the second main control. It allows luminosity and saturation remapping.
The Luma section has two hamburger menus, one for each sub-grid, so actions can be applied independently.
For operations like Saturate and Smooth, you can link both grids and apply the same change to both.
Color Distribution
Enable color distribution to visualize which colors are present in the image and where they land in the grid:
Luma-Saturation Remapping Examples
Example 1: Darken the Sky
In the blue sub-grid, drag the top-right point downward (brightest + most saturated blue range) to reduce sky luminosity:
Example 2: Compress Mid-Green Contrast
Drag middle-green points downward to compress luminosity into lower values and pull brighter values down:
How Saturation Works in the Luma Grid
Luminosity changes vertically (top = brighter, bottom = darker).
Saturation changes horizontally (center = neutral, left/right = more saturated).
Dragging points toward the center line desaturates. Dragging away from center increases saturation.
Example 3: Desaturate Bright Greens
In the second grid, drag the top-left point toward the center to desaturate bright green highlights:
Example 4: Desaturate Red Shadows
Drag the bottom-left red-region point toward the center to reduce saturation in red shadows:
