Multifunction apparatus and distribution server

Each operation screen for jobs to be executed by a multifunction apparatus is layered, according operation steps of the multifunction apparatus, and registered in a distribution server. Menus for displaying the operation screens are also registered in the distribution server, the menus being arranged in a tree-shape configuration. Corresponding to an operation on the multifunction apparatus, the menus are sequentially delivered from the distribution server to the multifunction apparatus, starting from a menu in the top layer. The multifunction apparatus displays each operation screen based on the delivered menus. Menu includes display text (text displayed on the operation screen), next screen name (screen name of the subordinate screen displayed on the operation screen), and action (command for the multifunction apparatus to execute).