This Maplet plots a surface given by a function of two variables, x and y, and up to three parameters a, b, and c. The effect of the parameters on the shape of the surface may be explored by adjusting the parameters with the sliders. The domain of the function may be changed by adjusting the x and y ranges on the right hand side of the Maplet. The zoom factor lets you quickly zoom in and out of the selected view. Slider bars on the plot window adjust the viewing angle. Sliders may be moved with the mouse or changed incrementally by selecting with the mouse and then using the arrow keys. Various buttons on the menu bar change the appearance of the plot.