The present invention provides a display control system suitable to flexible and smooth presentation. The invention can include a projector that stores page data included in projector display data in a stack area by a stack system in which the page data corresponding to the last page is at the head and projects the pages by a projecting device based on the page data read from the stack area. Further, when another projector display data is received during projection, the projector additionally stores the page data included in the other received projector display data in the stack area by the stack system.