According to aspects of the present disclosure, a CPU of a PC is configured to obtain a print settings used for printing by a printer. The print settings includes an item for a sheet size including a sheet length and an item for a print quality. A parameter settable to the print quality includes a parameter (e.g., a normal or high speed) corresponding to a high conveyance speed of a sheet and a parameter (e.g., a high or the highest image quality) corresponding to a low conveyance speed. When the sheet length of the obtained print size is longer than a particular length, a parameter to be set to the print quality is limited to the high image quality or the highest image quality, and otherwise, the parameter is not limited.