There are provided an imposition apparatus, an imposition method, and a non-transitory computer readable recording medium capable of setting a page box very easily. An instruction to change the relative position (or the relative size) of a frame image with respect to a page image in a preview image and an instruction to stop the change are given. The preview image is updated so that the frame image is in contact with a determined reference position (reference frame or reference line) by performing an additional change when a stop instruction is received.