I have added a field to two news feature classes - one of the fc's is in a dataset and the other is in a database in the SDE. The new field, in each fc, needs to have three domain choices, seen in the image in the Coded Values section.
When I access the Subtypes tab in the feature classes, I can't do anything because it is completely greyed out. How can I add these choices? Edit: I have now run the Create Domain tool and the Add Coded Value to Domain tool (image):