ZPL commands
^JM · Set Dots per Millimeter
Halves the resolution of the format dots per millimeter when needed, so all dimensions in dots print twice as large.
Halves the resolution of the format (dots per millimeter) when needed, so all dimensions in dots print twice as large.
Parameters
^JMn- n: A = full printer resolution (default), B = half resolution
Example
^XA
^JMB
^FO50,50^A0N,30,30^FDHello^FS
^XZ
Tip
^JM must come before the first ^FS in the format. With ^JMB a format built for 6 dots/mm, for example, prints at the same size on a 12 dots/mm printer.