The graphics set-up can be changed between a white and black background, and VGA (640 480 pixels) and Super VGA (1024 768 pixels), given the necessary graphics card and monitor. At the first prompt on the main sequence (and at other points in the program) select ``g'' for graphics. The ``Change graphics setup'' screen will appear showing screen colours. Enter ``b'' to toggle the background, ``g'' to toggle VGA and SVGA. Note that at present the mouse cursor is invisible in SVGA, though the left and right button presses work.