Sets the maximum label length calibration searches for; it must be equal to or greater than the real label length. It does not affect the preview.
^MLaThis command is a printer setting: the preview recognises it and skips it, because it does not change how the label looks. Its effect shows on the real printer.
^ML1200| Parameter | Description | Type | |
|---|---|---|---|
a | maximum label length in dot rows | int | Range: 1–99999 · ignored in preview |
The marked parameters are part of the ZPL specification and work on a real printer; the preview engine ignores them today.