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Library module Smart Collection Rules


New Member
Dec 28, 2019
Lightroom Version
Lightroom Classic version: 9.1
Operating System
macOS 10.14 Mojave
In creating Smart Collections that include rules for keywords, I have always used "Contains" or "Doesn't Contain". I notice that there are other options including: "Contains All" and "Contains Words".

Where can I find the definition of "Contains" vs. "Contains All" vs "Contains Words"?

Thank you.
Jun 20, 2009
Houston, TX USA
Lightroom Experience
Power User
Lightroom Version
Cloud Service
Welcome to the forum.
In {Contains}, the criteria field, each group of characters separated by a space is searched as a separate item An image containing any one of the items in the list will match

{keywords}{contains}{dog cat}
Images that match would have keywords "dogs' OR "Cat" OR "Doghouse". OR "Cathouse"

{keywords}{contains words }{dog cat}
Images that match would have keywords "dogs' OR "Cat" but not "Doghouse" nor "Cathouse"

{keywords}{contains all}{dog cat}
Images that match would have both keywords "dogs" OR "Doghouse AND "Cat" OR "Cathouse"
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