An image processing apparatus includes a thumbnail display control unit, a process display control unit, and a changing unit. The thumbnail display control unit controls a thumbnail image representing a content of the image data to display on the touch panel. The process display control unit controls process-indicating images corresponding to a plurality of candidate processes to be performed on the image data to display on the touch panel together with the thumbnail image. The changing unit changes a designated thumbnail image to a processed thumbnail image that represents a result of the designated process performed on the image data corresponding to the designated thumbnail image designated while maintaining to display the thumbnail image other than the designated thumbnail image designated each time the process designating unit designates the process.