Setting the default discriminator field name

On synchronizing a Class diagram based on ORM-Persistent classes with an ERD a parent class automatically gets a discriminator field within the entity to support its subclasses. This field name gets called Discriminator.

Is there a way to set this field name for my Project? I now have to alter the name within the ERD for each situation.

I found an deprecated manual where on page 15-14 one can read how to do this in the Open specifications tab of the entity. But in Agilian there is no such setting.