+---------------------------------+
|           SET FIELDS            |
+---------------------------------+
SET FIELDS ON | OFF

SET FIELDS TO  [[<field1>
        [, <field2> ... ]] | ALL]

-----------------------------------
Designates fields that may be accessed in database.
Default value - OFF
-----------------------------------

Specified fields are activated when SET FIELDS is ON, although using SET
FIELDS TO with a field listing automatically SETs FIELDS ON.

ON
        Only specified can be accessed.

OFF
        All the fields in currently selected database are accessible.

TO <field2>,[,<field2> ... ]
        Fields can be accessed in currently selected database.  Alias must be
specified with a field name in the following circumstances.

        .       When referring to field in a database not in currently selected work
area.

        .       When field names are same in two or more databases.

Using consecutive SET FIELDS TO  commands with a field listing adds
fields to those that are currently accessible, while using

TO ALL
        Makes all fields within the currently selected database accessible.