Secondaries & Power Windows

Where the primary correction changes the entire image at once, a secondary changes only a selected part of it — and that ability to isolate and grade just one region is what lets you work with real precision. There are two main ways to make a selection. A power window is a shape you draw on the frame — a circle, a rectangle, a custom mask — that limits your adjustment to what's inside it, perfect for darkening a bright sky, adding a subtle vignette to focus the eye, or brightening a face. A qualifier is a selection made by color or brightness — you pick a specific hue or tonal range and the software isolates everything that matches, perfect for changing the color of one object, boosting the green of foliage, or targeting skin. Combine them (a window to limit a qualifier to one area, tracking that follows a moving subject) and you can adjust almost anything in the frame independently. Secondaries are how you guide the eye, fix localized problems the primaries can't touch, and shape a scene with the finesse that separates a flat grade from a crafted one. Used with restraint, they're powerful; overused, they're a trap.

Secondary tools and moves

How to grade part of the frame:

• Power windows. Draw a shape to limit your grade to an area — a circle on a face, a rectangle on a sky, a gradient across a wall. Feather the edges so the adjustment blends invisibly.
• Qualifiers (keys). Select by color or luminance to isolate matching pixels — one red jacket, all the skin, the bright highlights. Refine the selection so it grabs exactly what you want and nothing else.
• Track your selections. When the subject or camera moves, tracking keeps the window or key locked onto it across the shot, so your secondary stays on target frame to frame.
• Guide the eye. Subtly brighten or warm your subject and darken or cool the surroundings (a vignette, a light shaped window) to pull attention exactly where the story wants it.
• Fix localized problems. Tame a blown window, calm an over-bright shirt, fix a color that's off in just one part of the frame — the surgical fixes the global primary can't make.
• Use restraint. Secondaries are seductive and easy to overdo. Keep them subtle and motivated; a grade drowning in windows and keys looks fake and processed. Less, and invisible, is the goal.

Precision, used with restraint

The way to think about secondaries is that they give you surgical precision — and precision, like any sharp tool, is powerful in a steady hand and dangerous in a careless one. The power of isolating part of the frame is enormous: it's how you direct the audience's eye without them ever noticing, subtly lifting and warming the subject while easing down the surroundings so attention flows exactly where the story needs it; it's how you rescue a problem the primaries can't fix, like a single blown window or one distractingly bright object; and it's how you push a look further, deepening a sky or enriching a specific color while leaving everything else alone. This is genuinely craft-level work, the finesse that makes a grade feel intentional and shaped rather than merely corrected. But the very power that makes secondaries valuable is what makes them a trap for the eager beginner, because they're seductive — once you can change anything in the frame independently, it's tempting to change everything, and a grade stuffed with windows and keys quickly becomes over-processed, artificial, and distractingly "graded," which is the opposite of good work. So the governing principle is restraint and motivation: every secondary should have a reason (guiding the eye, fixing a real problem, enhancing the look purposefully), and it should be subtle enough that no one notices it's there. The best secondaries are invisible — the audience feels their subject is naturally lit and their eye is naturally drawn, never suspecting a power window and a tracked qualifier made it so. Technically, this is also where care pays off: feather your window edges so the adjustment blends seamlessly, refine your qualifier so it grabs exactly the right pixels and doesn't chatter, and track carefully so the selection stays locked as things move — sloppy secondaries announce themselves with hard edges and buzzing keys. This chapter builds directly on the two before it: you always do your primary correction first to get the whole image right, and only then reach for secondaries to refine specific areas, checking your work against the scopes as always. And one of the most important secondary uses of all — getting skin tones right — is important enough to be its own chapter, which is next. Master secondaries with a light, motivated hand and you gain the precision to shape a scene exactly as you envision; overuse them and you'll make footage that looks artificial and over-cooked. Precision, always with restraint.