The preferred format represented by a number; valid values are from 0 (10X10) to 23 (144X144) and from 24 (8X18) to 29 (16X48); The default value is -1 which sets this to automatic; this is also documented in the user manual.
The top margin of the barcode (also know as quiet zone); The default is .06 CM.
W
width -
Variable in class com.idautomation.datamatrix.DataMatrix
Initial preferred width property of the bean
X
X -
Variable in class com.idautomation.datamatrix.DataMatrix
The size in CM of modules, default is .06; usually adjustable in increments of .03CM because (X * resolution) is used to convert to pixels; use setPixelsPerCM to change; if X * resolution = < 1, X will be set to one pixel.