I accidently used the "set surface_color, x" command, and then unset. Now the full surface is colored white. Rather, I want the surface to be colored by the color of the underlying residues, but it looks like I can't get it to do that after having used the set command. Any way of resetting the surface settings back to the default? I tried deleting the object I created for the surface and remaking it, but the settings are "stuck".