If you look back at the appearance form, there are several other quantities which will now be discussed. Realize that these all are attributes which are assigned to either surfaces or an entire part. You can select any color that is defined in the model file and apply it to whatever is selected.
Color is self-explanatory.
You can select any color that is defined in the model file and apply it to whatever is selected. Type Shading Type refers to what happens to a surface or part when it is shaded. Smooth is what is set by default and is what is most needed. It has to do with the display of the NURB surfaces. This should only be changed for very specific needs which do not generally have anything to do with shaded displays.