A curve graphic is created by positioning a 3D curve entity (Cartesian or parametric
        curve) in a reference frame (marker). The reference frame can be an explicit marker or can
        be implicitly defined using a body-point-orientation method.
        
        - 
                If the Graphics panel is not currently displayed, select the desired graphic by
                    clicking on it in the Project Browser or in the modeling window.
                The Graphics panel is automatically displayed. 
- 
                Click the Parent drop-down menu and choose the method to specify a reference
                    frame. 
                If Marker is chosen: 
                    - 
                        Click the Marker collector and select an
                            existing marker in the modeling window or the
                                Model Tree.
                        The curve will belong to the marker's parent body. 
- 
                        Click the Curve collector and select the 3D
                            Cartesian curve associated with the graphic.
                    
 If Body/Point is chosen: 
                    - 
                        Click the Body collector and
                    select a body from the modeling window, or double click
                    the Body collector to open the Model Tree (from which the desired body can be selected).
                
                    
- 
                        Click the Curve collector and select the 3D
                            Cartesian curve associated with the graphic.
                    
- 
                        Click the Point
                    collector (under Origin) and select a point from the modeling window, or double click the
                        Point collector to open the Model Tree (from which the desired point can be selected).
                
                    
- 
                        Use the orientation options to orient the
                    coordinate system.
                    
 
Tip: 
                
                    - Clicking [DC] allows you to view the direction
                        cosines' matrix for a coordinate system.
- The curve graphic is created using the X,Y, and Z data provided in the 3D
                        curve (Cartesian or parametric) with respect to the selected reference
                        frame.
- This curve graphic can be used to define 2D rigid to rigid contact or higher
                        pair constraints such as point to curve or curve to curve constraint.