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FTAS Content
Participant
August 29, 2025
Answered

Can't subtract from mask

  • August 29, 2025
  • 1 reply
  • 83 views

When I go to subtract from a mask, I am not able to click on "Subtract" from the mask. I have to create a mask and invert it from the original.

Lightroom CC Version 8.5.1

Macbook Pro macOS Sequoia 15.6.1

- Apple M4 Max, 64 GB unified memory

Correct answer FTAS Content

It now works. It was when I already had a subject mask and needed to refine the mask using a brush to subtract from the subject. I don't know what changed or happened but it works now.

1 reply

Sameer K
Community Manager
Sameer KCommunity Manager
Community Manager
August 29, 2025

Hey, @FTAS Content. Welcome to the Lightroom Community. I'll need some details about your workflow. 

 

The subtract mask button will not work on an image without a mask; this is by design. To verify this further, you can also try Lightroom on the Web (https://adobe.ly/4mB9csH). 

Has this worked for you in the past? Could you record your workflow, or share any reference? 

 

Awaiting to hear from you. Thanks! 

Sameer K
(Type '@' and type my name to mention me when you reply)

F
FTAS ContentAuthorCorrect answer
Participant
August 29, 2025

It now works. It was when I already had a subject mask and needed to refine the mask using a brush to subtract from the subject. I don't know what changed or happened but it works now.

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