Image forming apparatus capable of forming combinable images on separate sheets

An image forming apparatus, comprising:

• a medium storage for storing a sheet-formed medium;
• a medium conveyer configured to convey the sheet-formed medium from the medium storage along a predetermined conveying direction;
• an image forming device configured to form an image on the sheet-formed medium being conveyed by the medium conveyer;
• a user input interface configured to accept input from a user;
• and
• a controller configured to:
• operate the image forming device and the medium conveyer to perform a first action, in which the image forming device and the medium conveyer in conjunction with each other form an image composed of image data received from an external device in an area on the sheet-formed medium from one side of the image in a lengthwise direction toward the other side of the image, the lengthwise direction corresponding to the predetermined conveying direction;
• and
• on a condition where the first action is aborted, operate the image forming device and the medium conveyer to perform a second action, in which the image forming device and the medium conveyer in conjunction with each other form an image composed of the image data in another area on the sheet-formed medium different from the area in which the image was formed in the first action from the other side of the image in the lengthwise direction toward the one side of the image until a time point instructed by input from the user accepted through the user input interface.