1. A user interface method, within a computer system, for selecting and classifying a region of a scanned document comprising: (a) sending a signal to a scanner device to scan a document previously placed on said scanner device, wherein said scanner device is directed to scan said document using a preview scan mode to produce preview scan data of said document; (b) displaying said preview scan data of said document in a preview box within a scanner software window of a monitor attached to said computer system; (c) receiving a first click input from a graphical input device attached to said computer system, wherein said click input identifies a point on said monitor, said point being located within a first region of interest within said preview scan data within said preview box within said scanner software window of said monitor; (d) segmenting said preview scan data within said first region of interest to locate a first boundary of said first region of interest; and (e) displaying a first selection marker around said first boundary of said first region of interest within said preview box within said scanner software window of said monitor.