A server receives parameter-related data and sheet information from a first terminal device, determines a printing parameter based on the parameter-related data, registers, in a storage device, the printing parameter in association with registration-sheet information indicative of a sheet indicated by the sheet information received from the first terminal device, transmits, to a second terminal device, a list of sheets indicated by registration-sheet information registered in the storage device, receives a print command from the second terminal device, generates print data by using: the image data included in the print command; and a printing parameter associated with target sheet information, and transmits the print data to a printing device. The target sheet information is registration-sheet information indicative of a sheet specified by sheet-specifying data included in the print command. The print data is used for printing an image on the sheet specified by the sheet-specifying data.