How to Color Tone with Apply Image in Photoshop

Apply Image is one of those Photoshop features most people never discover, but it’s extremely powerful once you understand what it actually does. In this tutorial we’ll break down exactly how Apply Image works on both regular layers and layer masks, then use that understanding to color tone an image’s highlights and shadows completely independently, giving you far more control than a single color adjustment ever could.

What Apply Image Does

At its core, Apply Image takes the pixel data from a source, either a merged copy of everything currently visible in your document or a specific layer, and stamps that data directly onto whichever layer or layer mask you have selected. Go to Image > Apply Image to open the dialog and see it in action.

The Apply Image Dialog Options

Inside the dialog, the Source is the document you’re pulling from, in most cases your own open file. The Layer dropdown lets you choose Merged, which grabs everything currently visible across all layers, or a specific individual layer. Keep Channel set to RGB for standard full-color results. The Blending dropdown works just like a layer blend mode, with Normal simply pasting the source data as-is, and other modes like Multiply combining it mathematically with whatever is already on the target. There’s also an Invert checkbox, which flips light and dark before applying.

Using Apply Image on a Regular Layer

Create a new layer, then go to Image > Apply Image, choose Merged for your layer source and Normal for blending mode, and click OK. Photoshop copies everything currently visible in your document, background and any layers above it, directly onto your new layer. This is genuinely useful any time you need everything you see flattened onto a single layer without actually flattening your file, for example before running a tool like Liquify, which only works on one layer at a time. Apply Image lets you grab a full merged snapshot onto a fresh layer while keeping all your original layers intact underneath.

Using Apply Image on a Layer Mask

The second, more powerful use of Apply Image is applying image data directly onto a layer mask rather than a regular layer. Paint a solid color across a new layer with the Brush Tool, then add a layer mask to that layer. Click on the layer mask to select it, go to Image > Apply Image, and choose your Background layer as the source with Normal blending. Hold Alt (Option on Mac) and click the mask thumbnail to see the result: the mask now contains an exact grayscale copy of your background image, meaning the painted color layer above becomes visible only in the areas that were light in the original photo, and invisible where the original was dark.

Multiply Blend Mode for a More Defined Mask

To make that mask more selective, so the color shows up only in the brightest highlights rather than across a broad range of tones, apply the background to the mask again, this time using Multiply instead of Normal. Multiply darkens the mask further each time you run it, narrowing down which areas stay light enough to remain visible. You can repeat this step, applying the background with Multiply again, to keep refining the mask until only the truest highlights let the color layer show through.

Color Toning the Highlights

With the underlying logic in place, you can now apply it to real color toning work. Go to Layer > New Adjustment Layer > Color Balance. In the Color Balance panel, select Highlights and drag the sliders toward a warm tone, for example adding yellows and reds together with a touch of green for a sunset-style warmth. As it stands, this adjustment affects the entire image, not just the highlights, so click the adjustment layer’s mask, go to Image > Apply Image, choose Background as the source with Multiply blending, and click OK. The mask now mirrors your image’s own brightness, meaning the warm color only shows up in the parts of the photo that were actually bright to begin with.

Color Toning the Shadows

Repeat the same idea for the shadows on a separate adjustment layer. Add another Color Balance adjustment layer, select the Midtones tab, and drag in some blue and cyan for a cooler shadow tone.

Inverting the Mask to Target Shadows Instead of Highlights

Click the new adjustment layer’s mask, go to Image > Apply Image, choose Background with Multiply blending just as before, but this time check Invert before clicking OK. Without inverting, the mask would make this layer visible in the highlights too, exactly the opposite of what you want for a shadow tone. Inverting flips the mask so the cool color shows up only in the darker areas of the image, leaving the warm highlight tone from the other layer completely separate. Run Apply Image a second time with the same settings, Multiply and Invert, to pull the cool tone even further out of the highlights.

Refining Your Colors After the Fact

Because your highlight and shadow color adjustments now live on two separate, independently masked layers, you can go back and change either one at any time without disturbing the other. Double-click the highlight Color Balance layer’s thumbnail to adjust the warmth up or down, or double-click the shadow layer to shift its cool tone, since the masks defining where each color appears never change, only the color itself does. This gives you a level of fine control over an image’s overall look that a single, uniform color adjustment simply can’t match.

Why This Approach Works

This technique works because it separates two decisions that are usually locked together: what color to add, and where that color should appear. A normal adjustment layer’s mask is typically hand-painted or built from a rough selection, but Apply Image lets you build a mask directly from your image’s own actual brightness values, which is a far more precise and naturally graduated way to define highlights and shadows than painting ever could be. Multiply sharpens that precision by narrowing the mask toward only the brightest or, once inverted, only the darkest areas. Because the color and the mask live on separate, independent layers, you can revisit and adjust either one freely, long after the masking work is done.

Final Thoughts

Apply Image takes a bit of explaining to fully click, but the underlying idea is simple: it lets you take any image data, whether a merged copy of your document or a single layer, and stamp it onto another layer or mask. Once you can build a mask directly from your photo’s brightness, using Multiply and Invert to fine-tune exactly where it applies, color toning highlights and shadows separately becomes a fast, repeatable, and fully editable workflow rather than a one-shot global adjustment.

Quick Reference: Keys, Menus and Settings

• Open Apply ImageImage > Apply Image; Channel: RGB
• Copy what you seeNew layer; Layer: Merged, Blending: Normal
• See the maskAlt/Option-click the layer mask thumbnail
• Warm highlightsColor Balance, Highlights: yellow, red, a little green; mask: Background, Multiply
• Cool shadowsColor Balance, Midtones: blue, cyan; mask: Background, Multiply, Invert checked
• Change the colorsDouble-click either Color Balance layer

No AI, no generative credits.