The Layers menu. The Display2D overlays each field portrayal on top of one another. This menuallows you to selectively display or hide various field portrayals (we only have one for now).The Movie button. Press this to start a movie of the simulation running.The Camera button. Press this to take a picture of the simulation. You can save the picture out as abitmap (a PNG file) or as a publication-quality PDF vector image.The Options button. Press this to bring up various drawing options.The Scale Field. This widget lets you zoom in and out of the display (change its scale).The Redraw Field. This widget lets you zoom in and out of the display