You edit the database and set the extra attributes to "AutoIncrement" in the field definition.
Because a table can only have one auto incrememt field, and it MUST be indexed, I don't think you can do it through the Admin screen, but you can isue "alter" statements through the SQL Monitor.
Because a table can only have one auto incrememt field, and it MUST be indexed, I don't think you can do it through the Admin screen, but you can isue "alter" statements through the SQL Monitor.