A presentation apparatus stores parts data that includes parts data that includes type, location, and size of component parts that are displayed within a selected screen area, together with a selection rule that depicts the type of the component part that is to change a drawing state when the presentation apparatus is running in a presentation mode. When executing a presentation process, the apparatus selects a component part from the parts data, according to the selection rule, processes the selected screen area by changing an image of the selected component part, and generates the image to be used in the presentation.