
Click Reference Curve by 2D Sketch on the vertical toolbar.

Select the plate system for the reference curve.

Click Sketch Curve .

Specify one plane for the reference curve sketch using one of the following methods:
Define a coincident plane
Define an offset plane
Define plane using angle from plane
Define a plane using a point and a normal vector
Define a plane using three points
Define plane by vectors normal 
Click Add Intersecting Item .

Select objects in the model that intersect the sketching plane that you want to use as reference geometry. These extra objects appear in the 2D environment.

Click Add Projection Item .

Select objects in the model that do not intersect the sketching plane that you want to use as reference geometry. These extra objects are projected onto the sketching plane and appear in the 2D environment.

Click Sketch 2D .

In the 2D environment, sketch the reference curve.
You can constrain the curve to geometric construction points offset from plate systems. For more information, see Point at Minimum Distance Command in the SmartSketch Drawing Editor Drawing Editor Help, available within the 2D environment.

Click Finish in the 2D environment.

Click Boundaries .

Define the reference curve boundaries using one or more of the following methods:

Click Accept .

If the boundary definition results in two solutions, pick the needed solution using the following procedure:

Click Finish to place the reference curve.

If you do not select boundaries, the software uses the entire length of the base curve to apply to the resulting reference curves.

A reference curve is always attached to a plate system.