An image data output device comprising: a control part executing print setting processing that sets adjustment values utilized to adjust image quality of object image data that is to be printed; a choosing part choosing one of a plurality of kinds of test image data; a saving part saving the test image data chosen by the choosing part and configured to have the saved test image data added, changed and deleted; an inputting part for inputting the adjustment values; an adjusting part adjusting the test image data chosen by the choosing part based on the adjustment values that are input by the inputting part and set for the chosen test image data, the adjusting part further adjusting the object image data based on the adjustment value that is set for the chosen test image data; a display part displaying the chosen test image data adjusted based on the adjustment values by the adjusting part to preview adjustment effects for the test image data, wherein the test image displayed on the display reflects image quality adjustment made by said adjusting part; and a data outputting part outputting the object image data that has been adjusted by said adjusting part to a printing device characterized in that the display part displays: scroll bars to set adjustment values and a browse button for displaying and changing the chosen test image adjusted based on the adjustment values by the adjusting part to preview adjustment effects for the test image data; when the browse button is clicked, the display part displays a dialog to designate the position of the test image data for choosing the test image data recorded on a hard disk or other computers connected to a network; and a trial print button) configured to output said saved test image data of the image quality adjusted by said adjusting part to said printing device using said data outputting part to execute the printing; and a save button configured to save the adjustment values to a storage region in said printing device; and a delete button to delete the saved adjustment values; the choosing part chooses one of the plurality of kinds of test image data based on a user's arbitrary instruction and wherein said choosing part is able to choose saved test image data corresponding to the adjustment value set selected by said setting part and further including a setting information outputting part that is able to output setting information containing said adjustment value set and said saved test image data related with the value set and wherein a setting information inputting part is able to cause said setting part to store said adjustment value set based on said inputted setting information, and said saving part to save said saved test image data corresponding to the adjustment value set and said setting information is attached with identification information, and said setting information inputting part causes said setting part to store said adjustment value set and said saving part to save said saved test image data if said identification information satisfies prescribed conditions and does not cause said setting part to store said adjustment value set or said saving part to save said saved test image data if said identification information does not satisfy prescribed conditions and said identification information includes model information of said printing device. a control part executing print setting processing that sets adjustment values utilized to adjust image quality of object image data that is to be printed; a choosing part choosing one of a plurality of kinds of test image data; a saving part saving the test image data chosen by the choosing part and configured to have the saved test image data added, changed and deleted; an inputting part for inputting the adjustment values; an adjusting part adjusting the test image data chosen by the choosing part based on the adjustment values that are input by the inputting part and set for the chosen test image data, the adjusting part further adjusting the object image data based on the adjustment value that is set for the chosen test image data; a display part displaying the chosen test image data adjusted based on the adjustment values by the adjusting part to preview adjustment effects for the test image data, wherein the test image displayed on the display reflects image quality adjustment made by said adjusting part; and a data outputting part outputting the object image data that has been adjusted by said adjusting part to a printing device scroll bars to set adjustment values and a browse button for displaying and changing the chosen test image adjusted based on the adjustment values by the adjusting part to preview adjustment effects for the test image data;