Commodore Plus 4 - Page 161

Section 4. The File Manager 149
The UD command stores the current record with the record number currently
displayed unless you specify some other record number in the UD command.
You can also use UD as a shortcut to make duplicates of a record or when you
want to store a record that is almost identical to the current record. To store a
record with a record number other than the one displayed on the screen, just
include a record number in the UD command. For example, if you are storing
records of a stamp collection and have two similar stamps, enter and store the
first stamp as record 1. Then change the record while record 1 is still displayed on
the screen. Save this version of the record with the command ud2;.
Examples: ud Stores the current record.
11(137; Stores the record information currently on the screen as record
number 37.