if there is printings in area a, the document size may be mis-detected. if there is printings in area b of a document, it may cause double-feed errors. following figure shows print prohibited areas on a document. if double-feed detection is to be enabled, it is recommended to avoid printing in these areas. this must be considered when designing forms and document format.

    for the details of double-feed detection, please refer to "appendix-2 double feed detection conditions."