Auto Redraw—Automatically redraws the surface in response to changes made to the X Rotation, Z Rotation, or Zoom Factor controls. (Default: Selected.)

X and Z Rotation—These controls allow you to interactively rotate the surface (counter-clockwise around either the x- or z-axis) a specified number of degrees. The current rotation is shown in the text field to the right of the slider.

Zoom Factor—Scales the original surface by multiplying (zooming out) or dividing (zooming in).