Select Subject (duplicate) · Temp +200 · Tint –10. Controls color only — independently.
🏆Keeping exposure and color in separate masks means you can remove the color grade without losing the exposure correction — and vice versa.
Safe Experimentation
Duplicate Before Making Bold Changes
About to modify a mask you worked hard on? Duplicate it first. Experiment on the copy. The original stays frozen and safe.
✓
Original mask — working well, took time to build
Select Subject + subtract + refinements. You're happy with it. Now you want to try adding a Luminance Range Mask refinement.
→
Duplicate first — then experiment on the copy
Try the Luminance Range refinement on the duplicate. If it doesn't work — delete the copy. If it does — you've improved your mask and still have the original.
🛡️Duplicate before you experiment. Worst case: delete the copy. Best case: a great improvement with your original still intact.
Practical Example
Duplicate & Modify — Hair-Only Mask
Start with Select Subject. Duplicate it. Subtract the hat from the copy. Apply hair-specific adjustments to the duplicate — Clarity, Texture — without touching the full-subject mask.
1
Select Subject → full subject masked (including hat)
Apply exposure/contrast here — for the whole subject. This is Mask 1.
2
Duplicate Mask 1
Both masks now cover the full subject. You'll modify the copy next.
3
On the duplicate — Subtract → Select Object → paint the hat
The duplicate now covers subject minus hat. Essentially: hair, face, body.
4
Apply Clarity +30, Texture +20 to the duplicate
Hair detail is enhanced. Hat is excluded. Original subject mask is untouched.
Organization
Name Your Masks — Double-Click to Rename
As soon as you create or duplicate a mask, rename it. Describe the region AND the purpose so you know what it does at a glance.
⚠️
Hard to Read
Mask 1 Mask 1 copy Mask 2 Mask 2 copy
✅
Much Better
Subject — Exposure Subject — Color Grade Sky — Darken Sky — Blue Saturation
✏️Double-click any mask name in the Masks panel to rename it inline. Do it immediately — before you apply adjustments.
Common Confusion
Duplicate vs. Copy to Another Photo
📋
Duplicate
Creates a second mask within the same photo. Same geometry, zero adjustments. Used to layer multiple adjustment sets on one image.
📤
Copy to Another Photo
Transfers a mask across photos. Right-click → Copy Mask to → target photo. Useful for consistent masking across a series.
💡Both options appear in the same right-click menu. Duplicate = same image. Copy Mask to Another Photo = different image. Different tools, different purposes.
Workflow: Portrait
Subject Mask × Two Adjustments
Duplicate the subject mask — apply tonal correction on one, color grade on the other.
🌍
Basic panel first — global tonal foundation
Correct overall exposure, white balance, highlights, and shadows before masking.
1
Mask the background — darken and de-haze
Linear Gradient or Select Background. Exp –0.5, De-Haze +15 to add depth without distracting.
2
Select Subject → Exposure lift (Mask 1)
Exp +0.6, Contrast +10. This is your tonal correction for the subject.
3
Duplicate → Color grade (Mask 1 copy)
Temp +150, Tint –8. Warm the subject independently of the tonal correction. Name both masks.
👁️Toggle each mask on/off individually to verify it's doing exactly what you intend — and nothing more.
Workflow: Landscape
Sky Mask × Two Adjustments
Select Sky once. Duplicate it. Darken on one mask. Blue saturation boost on the other.
Select Sky (copy) · Sat +30 · Hue –5 (blue shift). Controls color only — independently.
⚡Select Sky runs once. Duplicate the result — two uses, zero extra AI processing. Toggle each to fine-tune without interference.
Organization Tips
Keeping Your Mask Stack Clean
📝
Name every mask — double-click inline to rename
Format: "Region — Purpose." Example: "Sky — Saturation," "Subject — Clarity." If you can't tell from the name, rename it.
👁️
Hide masks you're not editing — click the eye icon
Reduces overlay clutter. Focus on one mask at a time. Toggle others back on when you need to check interactions.
🔀
Reorder by dragging — keep related masks together
Drag mask rows up or down. Group all subject masks, then all sky masks. Easier to navigate as the list grows.
🗑️
Delete unused duplicates — right-click → Delete
If an experimental copy didn't work out, delete it. A clean list is faster to navigate and easier to revisit later.
Your Homework
🎯
Masking Duplicate Challenge
Pick a portrait or subject photo. Work through these steps before Lesson 28.
👤 Add Mask → Select Subject — let Lightroom create the initial mask
📋 Right-click the mask → Duplicate — you now have two identical masks
✏️ Rename both: "Subject — Exposure" and "Subject — Clarity"
☀️ On the Exposure mask: Exposure +0.5–+0.8, Contrast +10
🔍 On the Clarity mask: Clarity +30, Texture +20, Sharpness +15
👁️ Toggle each mask on/off to see its individual contribution
💬 Share a before/after or describe what you noticed in the comments
Up Next
3 Things to Remember
1
Geometry Copies, Adjustments Don't
The duplicate has the same mask shape but zeroed-out sliders. Right-click → Duplicate in the Masks panel.
2
Layer Independently
Exposure on one mask, color on another. Toggle each off to check it. Modify one without touching the other.
3
Name, Order, Clean Up
Double-click to rename. Drag to reorder. Delete unused copies. A clean mask stack is a fast, stress-free workflow.
Lesson 28 — Lightroom Classic
Duplicate & Invert
Duplicate a mask, invert the copy — and you instantly have the perfect opposite selection. Mask the subject, duplicate, invert, and your background is already masked. No brush painting, no guessing. One AI selection, two complementary masks.