Barcode2D.Yunit the height of the bar in the barcode in Mils (thousandths of an inch).
Default value: 200
Allowed values: 8 – 500 mils
This may be used to specify the height of the bars in standard mil units (NOT mm. 1 mil = 0.001 inches). Barcode should not normally be produced with an Y value smaller than 10, and MUST NOT be produced with an Y value smaller than 8 - or the barcode will not meet the standard specification.
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