1. A non-transitory computer readable storage medium storing a computer executable program executable by a computer to cause the computer to perform a process comprising: (a) displaying a setting screen including a plurality of first tubs, in which prescribed setting items determined in advance are displayed, and a second tub, having a plurality of display positions in which setting items displayed within the plurality of first tubs are displayable; (b) displaying an editing screen including prescribed setting items in a list, the prescribed setting items being included in the first tubs of the setting screen and registrable into the second tub of the setting screen; (c) accepting a registration instruction in the editing screen for registering at least one of the prescribed setting items included in the list, and associating the registered at least one of the prescribed setting items with a designated one of the plurality of display positions in the second tub, based on an operation conducted by a user; (d) displaying an image, which indicates the designated display position of the registered at least one of the prescribed setting items in the second tub, in association with the registered at least one of the prescribed setting items included in the list in the editing screen, when the registration instruction is accepted in step (c); and (e) displaying on the setting screen the registered at least one of the prescribed setting items at the designated display position in the second tub.