They allow the user to list information, plot only selected graphic entities, label lines, points, nodes, etc. This documentation is taken directly from the Moviestar help files and included here in a hyper-text format for your convenience. Clear Clear the terminal screen. Color Set color for the various entities and options listed in the sub-menu.
Color is specified in terms of red, green, and blue color components.
The value of each component may range from 0.0 to 1.0 or from none to full intensity respectively. Background Set the background color. Constraint Set the constraint color. Coordinate-frame Set the coordinate frame color. Element Set the element color.