Brother RJ-4040 - Manual (Page 49)

ESC/P Command Reference
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5. Control Command Details
CR Carriage return
ASCII: CR
Decimal: 13
Hexadecimal: 0D
Parameters
None
Description
 Ends input of a line, and waits for input of the next line.
 The next print position becomes the beginning of the next line.
 A line feed command immediately after the carriage return is ignored.
Auto-canceling double-width characters specified with SO or ESC SO are canceled.
 Same process as LF