As with the previous demo, the "Domain" window allows the user to move a white point to determine lines in the u, v, and w directions colored red, green, and blue respectively. By selecting the uv, uw, or vw slice surface checkboxes in the control window, purple, cyan, or brown planes are displayed respectively.  These planes are the planes determined by the lines in the two directions mentioned associated with the checkbox.

The "Slice Surfaces" window opens showing the image of the domain under the function as well as the image of the above mentioned lines.  By selecting the uv, uw, or vw slice surface checkboxes in the control window, purple, cyan, or brown slice surfaces are displayed respectively.  These are the images of the above mentioned planes under the function.