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- Use the 2 LINES option to define the bottom of the Finger
- Guide as the projection plane.
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- You then use the 2D ENT option to indicate the projection
- direction. This option allows you to use the plane of a
- two-dimensional entity, (a circle, spline, or ellipse) to
- define the projection direction.
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- Because the plane of the circle and the bottom plane are
- not aligned, the resulting entity is an ellipse.
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