Abstract: Provided is an illustration creating program which can be easily used even by a first-time user. When the program is started, a menu bar, a toolbox, a preview window and setting windows are displayed on a display. When a submenu item “New” is selected from a main menu item “File” of the menu bar, a drawing window is displayed on the screen. Thus, the toolbox, the preview window, a paintbrush information setting window capable of setting a tool, a color setting window, a color palette setting window, a control setting window, a layer setting window capable of setting the drawing window, and a selected-range setting window are displayed on the screen.