Editing Polylines in AutoCAD

You can edit polylines by closing and opening them and by moving, adding, or deleting individual vertices. You can straighten the polyline between any two vertices and toggle the linetype so that a dash appears before and after each vertex. You can set a uniform width for the entire polyline or control the width of each segment. You can also create a linear approximation of a spline from a polyline.
2D and 3D polylines, rectangles, and polygons and 3D polygon meshes are all polyline variants and are edited in the same way. For information about editing 3D polylines and polygon meshes, see “Editing in 3D.”

To modify a polyline

  1. From the Modify menu, choose Polyline.
  2. Select the polyline to modify.
  3. Choose an option to modify the polyline.

Command line PEDIT
Shortcut menu Select the polyline to modify, right-click in the drawing area, and choose Polyline Edit.
System variables SPLFRAME , SPLINESEGS, and SPLINETYPE control spline-fit polylines.

In the following illustration, each polyline segment has a different start and end width, resulting in a taper.


To taper the width of individual polyline segments

  1. From the Modify menu, choose Polyline.
  2. Select the polyline to edit.
  3. Enter e (Edit Vertex). The first vertex is marked with a cross.
  4. Enter w (Width).
  5. Enter different start and end widths. Press ENTER to move to the next vertex or enter n (Next).
  6. Repeat steps 4 through 6 for each segment.
  7. Enter x (Exit) to apply the new widths to all segments.

Related PFACE creates polyface meshes.


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