When do we define the additional fields to be populated along with the locator field?

A.
At runtime in the record with the Ed it Map command.

B.
After the locator field has been saved, with the Edit Map command.

C.
At the same time that the locator field is first created and before it is saved.

D.
After the locator field has been saved, from the additional fields own Edit Map properties.

Explanation: