Here you can choose a coordinate system of Cartesian, Cylindrical or Spherical. 3 surfaces are shown for each system choice. For Cartesian the surfaces are constant x, y and z values that are adjustable with the sliders. For cylindrical coordinates the sliders change to constant r, \theta and z. Switching to spherical coordinates changes the sliders to r_0, \theta_0 and \phi_0.[br]A yellow point is also shown where all three surfaces intersect along with its dimensions in the current coordinate system.