Image-formation control device, image-formation control method, and computer program product

A device includes: a receiver receiving a displacement of an image formation target area in a sub-scanning direction from a reference position on a continuous form with side portions having holes and with a page boundary per a length; a calculator calculating marker lengths of markers marking upper and lower ends of a page of the continuous form based on the displacement, a shortest distance to the holes from the page boundary, and a reference length for when the displacement is not specified for the markers; another calculator calculating start positions of the markers based on the displacement, the distance, the reference length, and a length of the target area in the sub-scanning direction; and a controller performing, with respect to an apparatus, control of the image formation of the markers in the side portions from the start positions over the marker lengths.