Projecting Sketched Curves
You can project a sketched curve onto a model face to create
a 3D curve. You can also create a 3D curve that represents the intersection
of two extruded surfaces generated by creating sketches on two intersecting
planes.
You can preselect items before you click Project
Curve 
. If you preselect items, SolidWorks attempts
to select the appropriate
type of projection.
You can right-click in the graphics area and select a projection type
from the shortcut menu. When you have selected enough entities to create
a projected curve, the OK 
pointer appears. Right-click to create the projected curve.
To project a curve:
-
Click Project Curve on the Curves toolbar, or Insert,
Curve, Projected.
The Projected Curve PropertyManager
appears.
Under Selections,
set Projection Type to one of
the following:
Sketch on Faces
Sketch on Sketch
Click OK 
to create the projected
curve, or Cancel
to cancel the transaction.