the rule of thumb is: don't use Autonumber to assign values that will have
meaning to the user. an Autonumber is meant to uniquely identify each record
in a table *to the database engine*, not to any person.
to assign a meaningful, consecutively numbered value to each new record in a
table, you can write code, or a macro, and run it from the data entry form's
BeforeInsert event.
hth