1. A data processing setting apparatus comprising: display control means 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; and set information display processing means 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 means, the set information corresponding to the function set by said function setting means and indicating that the function has already been set.