Patent attributes
In a layout system, assuming that container (partial region) B is set with a high priority level, and the contents of container A are changed after a previous browse timing of the user, container B is preferentially laid out irrespective of the change in contents of container A. Upon generating a digital document by inserting contents in respective containers in accordance with the definition of a document template, the unread/read state of a container or content is managed for each user. The priority level of display of the container or a container in which the content is inserted is set in accordance with the unread/read state of the container or content, and a digital document on which a plurality of containers are arranged in accordance with the priority levels is generated.