Some barcode types permit a variety of security levels to be adopted when text is converted into a barcode image. This edit box allows the security level to be specified. PDF 417 supports security levels from 0 - 8, 0 is no additional security, while 8 is a large amount of security - but at the price of a significantly larger barcode.
This box will be greyed out for barcode types that do not support user-selected security levels.
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