1. A data processing setting apparatus comprising: display control section for displaying plural kinds of function information on a setting screen image for setting a data processing, each of the plural kinds of function information indicating a function of the data processing and being able to be identified by the function; function setting means for (i) selecting the function corresponding to the function information selected, in response to an input instruction, from plural pieces of function information among the plural kinds of function information, the plural pieces of function information being displayed on the setting screen image, and (ii) setting the selected function; set information display processing section for displaying set information in a region of the setting screen image, not in a region in which the plural kinds of function information are displayed by said display control section, the set information corresponding to the function set by said function setting section and indicating that the function has already been set; and resulting image display processing section for displaying a resulting image in a region of the setting screen image, not in the region in which the plural kinds of function information are displayed by said display control section or in the region in which the set information is displayed by said set information display processing section, the resulting image showing a result of the data processing using the function set by said function setting section; wherein, when said function setting section sets a plurality of functions, said resulting image display processing section synthesizes a plurality of resulting images corresponding to the plurality of functions, and displays the synthesized image.