What user has modified knowledge records?

You can see who has modified a knowledge library record last by the meta-data field called Modified. You can see when that user made the change as well. 

If you want to, you can even filter by the Last Modified By user, or the date when records were modified. There are many filter options, so explore and you'll be able to see your data in many ways. 

In the record itself, you can see a detailed history of modifications. 

You can even compare two versions in history. This opens up a Compare screen so you can see what has been added or deleted between versions. 

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