For PDF417 and RSS barcodes only.
Sets the height of barcode elements as a multiple of the X dimension to the value specified in the n parameter.
For PDF417 barcodes this value should be one of 2, 3, 4 or 5.
Default: 3
For RSS-14 and Extended barcodes values of 30 – 50 are suggested, although those subtypes that have values specified in the standard (Stacked and Omni Stacked) will ignore value provided here.
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