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To extend several entities using the fence selection method

  1. Do one of the following:
    • Choose Modify > Extend.
    • On the Modify toolbar, click the Extend tool ().
    • Type extend and then press Enter.
  2. Select one or more boundary edges, and then press Enter.
  3. In the prompt box, choose Fence.
  4. Specify the first point of the fence.
  5. Specify the second point of the fence.
  6. Specify the next fence point, or press Enter to complete the command.




Select the boundary edge (A), and then specify the first point (B) and second point (C) of the fence.



When you extend a wide polyline, its centerline intersects the boundary edge. Because the end of the polyline is always cut at a 90-degree angle, part of the polyline may extend past the boundary edge. A tapered polyline continues to taper until it intersects the boundary edge. If this would result in a negative polyline width, the ending width changes to 0.




A tapered polyline (A) continues to taper until it intersects the boundary edge (B).



Extend an entity

Extend an entity to an implied boundary

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