A controlling device may perform an image process on specific image data so as to generate processed image data, select a process mode from a plurality of process modes, including a first process mode and a second process mode, and perform the image process according to the selected process mode. The first process mode may be for performing the image process by performing, in order to compensate variability of discharging amounts of the liquid droplets discharged from the plurality of nozzles, a specific process on a target pixel within target image data using correction data for a target nozzle. The target nozzle may be to form a dot at a position on a print medium corresponding to the target pixel. The second process mode may be for performing the image process by performing the specific process on the target pixel within target image data without using the correction data for the target nozzle.