Checking printout at host device

A non-transitory computer readable storage medium having stored therein a computer program that when executed by a processor of an image forming apparatus, causes the image forming apparatus to:

• receive a first print job from the host device;
• generate a printout corresponding to at least one page of a target document of the first print job;
• in response to a proof print function being activated for the first print job, generate a scan image of the printout and send the scan image to the host device;
• receive, from the host device, information regarding a change of a print setting for the first print job or receive or, from the host device, a second print job generated for the target document;
• and
• perform, based on the information, image generation of the first print job or perform image generation of the second print job.

A host device connectable to an image forming apparatus, comprising:

• a display device;
• a transceiver;
• an input device;
• and
• a controller to:
• control the input device to receive an input to activate a proof print function;
• control the transceiver to send a first print job to the image forming apparatus and to receive from the image forming apparatus a scan image of a printout of the first print job;
• control the display device to display the scan image;
• and
• control the transceiver to send, to the image forming apparatus, information regarding a change of a print setting for the first print job or to send, to the image forming apparatus, a second print job generated for a target document of the first print job.