A dedicated, colourist-style colour-grading workspace — a superset of the old Develop colour panel, in its own module.
Grading is a canvas-first module for shaping colour, opened with (⌥⌘4). It shows the image large with a compact panel on the right, and it composes after your Develop edits — so a grade sits on top of the finished photo everywhere it appears (grid, loupe, export, print). The Explorer sidebar is hidden here to give the canvas room.
A master Enable Grading switch A/Bs the entire grade. With it off, the photo shows exactly as it left Develop — useful for a quick before/after of everything the module is doing.
The panel has two tabs: Color for colour grading, and B&W for monochrome conversion (below).
The heart of the module is a hue/chroma plot you populate with pins. Click the image to drop a pin seeded from that spot's colour, then drag the pin's outer handle to shift its hue and chroma. Each pin has its own Hue, Chroma, Lightness and Range controls, so you can push one colour without disturbing the rest.
Each pin can be confined to a range of brightness with the band chips — Full, High, Mid, Shadow — or a draggable custom luminance strip. This lets a colour change apply, say, only in the shadows.
Classic lift/gamma/gain-style wheels for Shadow, Mid, High and Global tonal ranges — the same wheel control used elsewhere in the app, for broad tint moves.
DaVinci-style secondary curves (hue-vs-hue, hue-vs-sat, and so on) for targeted, curve-based colour adjustments.
On the B&W tab, an 8-channel mixer controls how each colour maps to grey, plus film-filter presets that emulate classic black-and-white looks.
Load a reference image — from disk, or by choosing a photo from your Library — and Auto-Match seeds pins to move your shot toward the reference's palette, as a grading starting point you then refine.
A grade is stored per photo, separately from your Develop settings, and is baked into thumbnails when you leave the module so the grid reflects it.