Printer and printing jig

A printer that prints on a substrate held by a printing jig including a plurality of position detection marks, the printer comprising:

• a table on which the printing jig to hold the substrate is to be placed;
• a print head movable relative to the table and performing printing on the substrate held by the printing jig placed on the table;
• a detector that detects the position detection marks of the printing jig placed on the table;
• and
• a controller connected to the print head and the detector, wherein
• the controller is configured or programmed to include:
• a storage to store initial print data including information of a plurality of reference position marks each associated with one of the position detection marks, and information of a design to be printed on the substrate;
• a reader to acquire, using the detector, positional information of the position detection marks included in the printing jig, which is placed on the table;
• a print data generator to modify the initial print data such that the reference position marks stored in the storage each coincide with an associated one of the position detection marks acquired by the reader, thus generating actual print data to be used for actual printing;
• and
• a printing controller to control the print head in accordance with the actual print data so as to perform printing on the substrate.