Newland NLS-NVH200 User Manual page 184

Enter Setup
Rectangular Barcode
Data Matrix has two formats:

Square barcodes having the same amount of modules in length and width: 10*10, 12*12

Rectangular barcodes having different amounts of models in length and width: 6*16, 6*14.....14*22.
** On
Data Matrix Inverse
 Regular barcode: Dark bars on a bright background.
 Inverse barcode: Bright bars on a dark background.
Decode Regular Data Matrix Barcodes Only
** Decode Both
**【Exit Setup】 170
144*144.
Off
Decode Inverse Data Matrix Barcodes Only