View source for Zebra RW 420 Printer Configuration

Margins must be 4 by 11 with .12 on the left margin

Sometimes Zebra has multiple printers showing up with (copy 1) and (copy 2) etc so make sure the margins are adjusted on the one that is actually plugged in.  Every time you plug the printer into a different USB port it can create a 'copy' in the printer device list.  Anytime you swap a different zebra printer out and plug into any USB port it can create a new 'copy' in the printer device list.