It is possible to activate the journal feature (logging of all property value changes) for any MetaProperty of an existing MetaClass.
- Open the MetaClass in the Classification View
- Select the MetaProperty you want to activate the journal feature for
- Select the Checkbox "Changelog active" in the details of the right hand RelationData editor
- Save the MetaClass
Now the logging of all value changes for the selected property is activated. It is possible to turn off this feature by again removing unchecking "changelog active".