A program being a prescribed program, wherein the prescribed program comprises instructions which, when the program is executed by a computer, cause the computer to execute: a display controlling step of executing processing to display a first display region (404 and 803) to execute printing by using a first color adopting an ordinary color ink being an ink of a process color and a specific color ink being an ink of a color other than the process color, and a second display region (404 and 803) being different from the first display region (404 and 803) to execute printing by using a second color being different from the first color and adopting at least the specific color ink; and a change controlling step of executing processing to change from setting to print a first print region in a print target image corresponding to first RGB values by using a third color being the process color to setting to print the first print region by using the first color in a case where the first display region (404 and 803) is operated, and processing to change from setting to print a second print region in the print target image corresponding to second RGB values by using a fourth color being the process color to setting to print the second print region by using the second color in a case where the second display region (404 and 803) is operated, characterized in that the first display region (404 and 803) displays an object of a fifth color that is a color corresponding to the first color and is different from the first RGB values and the third color, and the second display region (404 and 803) displays an object of a sixth color that is a color corresponding to the second color and is different from the second RGB values and the fourth color. a display controlling step of executing processing to display a first display region (404 and 803) to execute printing by using a first color adopting an ordinary color ink being an ink of a process color and a specific color ink being an ink of a color other than the process color, and a second display region (404 and 803) being different from the first display region (404 and 803) to execute printing by using a second color being different from the first color and adopting at least the specific color ink; and a first display region (404 and 803) to execute printing by using a first color adopting an ordinary color ink being an ink of a process color and a specific color ink being an ink of a color other than the process color, and a second display region (404 and 803) being different from the first display region (404 and 803) to execute printing by using a second color being different from the first color and adopting at least the specific color ink; and a change controlling step of executing processing to change from setting to print a first print region in a print target image corresponding to first RGB values by using a third color being the process color to setting to print the first print region by using the first color in a case where the first display region (404 and 803) is operated, and processing to change from setting to print a second print region in the print target image corresponding to second RGB values by using a fourth color being the process color to setting to print the second print region by using the second color in a case where the second display region (404 and 803) is operated, processing to change from setting to print a first print region in a print target image corresponding to first RGB values by using a third color being the process color to setting to print the first print region by using the first color in a case where the first display region (404 and 803) is operated, and processing to change from setting to print a second print region in the print target image corresponding to second RGB values by using a fourth color being the process color to setting to print the second print region by using the second color in a case where the second display region (404 and 803) is operated, characterized in that the first display region (404 and 803) displays an object of a fifth color that is a color corresponding to the first color and is different from the first RGB values and the third color, and the second display region (404 and 803) displays an object of a sixth color that is a color corresponding to the second color and is different from the second RGB values and the fourth color.