It sounds to me as though you are simply looking for a "default" supervisor
(Smith). Is that true? If so, open your form in the design view, double-
click on the supervisor control, click on the data tab and enter the name
of the supervisor you would like it to default to (Smith)in the "Default
Value" property.
When you go to the data input view, Smith should be the day's supervisor.
When it is on focus, you have the option of retaining it or typing over the
default (Smith) with whoever (Jones)
Hope this helps - John