Abstract: A drawing software causes a computer to function as a wizard control unit and a highlighting-shift control unit. The wizard control unit stores, in a storage unit, function-dependency relation data that indicates the setting order of a plurality of sub-functions included in a function of a programmable display device, stores, in the storage unit, setting-item dependency relation data that indicates the setting order of respective setting items on a setting screen of a sub-function, displays, on a display unit, a list of a plurality of sub-functions having assigned numbers based on the function-dependency relation data, and displays, on the display unit, a setting screen of a sub-function selected from among the displayed list of the sub-functions. The highlighting-shift control unit sequentially highlights respective setting items on the setting screen of the sub-function on the basis of the setting-item dependency relation data.