1. A system for performing a colorization process from monochrome print data to color data for printing a receipt or other sales document in two or more colors, the system comprising: an application for displaying a user interface for setting colorization information for performing the colorization process, the user interface including: a component for setting a color of text, a component for setting a background color, and a component for setting a background style having alternating background color and non-colored portions, the background style setting component enabling the setting of a frequency of the alternating background color and non-colored portions on a number of lines basis; and a memory in which the colorization information set via the user interface is stored and from which colorization information can be read for display; wherein the user interface enables visual confirmation of the settings to be used in the colorization process, and wherein the color of text and the background color are set independently.