The imprinter option enables users to print information on original documents for document management purposes. While the FI-590PRF (pre-imprinter) prints information on the front of documents prior to scanning, the FI-590PRB (post-imprinter)prints information on the reverse-side of documents after they have been scanned. Although both the FI-590PRF and the FI-590PRB may be attached to the same scanner unit, both imprinters cannot be used simultaneously.