EDIT—RENUM subcommand operands

new_line_number: specifies the new line number to be assigned to the first line renumbered. If this operand is omitted, the first line number is 10.
increment: specifies the amount by which each succeeding line number is to be incremented. The default value is 10. You cannot use this operand unless you specify a new line number.
old_line_number: specifies the location within the data set where renumbering begins. If this operand is omitted, renumbering starts at the beginning of the data set. You cannot use this operand unless you specify a value for the increment operand or when you are initially numbering a NONUM data set.
end_line_number: specifies the line number at which renumbering is to end. If this operand is omitted, renumbering continues to the end of the data set. You cannot use this operand without specifying all the other operands.