Add Field allows you to add a new field to the current database.
You will be asked for a fieldname, a constraint pattern and a
value for the new field.
With 
and 
you can step through names, patterns and
values entered earlier.
Typing TAB will abort the operation.
Fieldnames must be alphanumeric.
All fieldnames must be unique.
The current database will be made nameless because the descriptor was modified. The database will be marked modified.