A layout process using content data as output and a template containing regions to which content data is assigned is provided. A document processing apparatus performing the process includes a priority order setting unit that independently sets, for regions to lay out contents data, priority orders by assigning contents data in the regions and a determining unit for determining the size of a region for which a first priority is set. The determining unit uses a template containing the regions and sizes of contents data to be assigned to regions, and determines a size and a position of remaining regions using a portion of the template to which the regions having higher priorities than the remaining regions not laid out and sizes of the contents data to be assigned to the remaining regions.