The renumber command is equivalent to running the bformat command, with the r option and a control table specifying no indentation.
The table is stored in the messages file. The item-ID of the control table is bf, followed by a four-character hexadecimal number. The table number is contained in line 4 of the command definition. The default table number is 0, thus the default table item-ID is bf0000. The structure of the table is identical with the blist control table. The only default option is r for renumber.
The r option is useful for renumbering a source program to make it easier to follow.