I remember that controlling which DITA elements automatically were assigned an @id attribute was handled through Options > Preferences. But I cannot seem to find the specific page ...

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Best,
Kris

Kristen James Eberlein
Chair, OASIS DITA Technical Committee
OASIS Distinguished Contributor
Principal consultant, Eberlein Consulting LLC
www.eberleinconsulting.com
+1 919 622-1501; kriseberlein (skype)