Modify or Join Polylines

Additional editing operations are available for changing the shape and display of polyline objects. You can also join separate polylines.

You can modify polylines in several ways using PEDIT, the Properties palette, or grips including the following:

Join Polyline Segments

You can join a line, an arc, or another polyline to an open polyline if their ends connect or are close to each other.

If the ends are not coincident but are within a distance that you can set, called the fuzz distance, the ends are joined by either trimming them, extending them, or connecting them with a new segment.

Spline-fit polylines return to their original shape when joined. Polylines cannot be joined into a Y shape.

If the properties of several objects being joined into a polyline differ, the resulting polyline inherits the properties of the first object that you selected.

Modify a Segment Within a Polyline

You can modify a segment in a polyline using the MOVE, ROTATE, or SCALE commands. You select the single arc or line segment, also called a subobject, within a polyline by pressing Ctrl when you click it.

You can also use the Stretch, Move, Rotate, and Scale grip modes to modify the polyline segment. Properties of polyline segments such as color or linetype, cannot be modified individually, but you can use the Properties palette to modify the width of individual segments.

To modify a polyline

Click Home tabModify panelEdit Polyline.At the Command prompt, enter pedit.
Select the polyline to modify.
NoteYou can select a single arc or line segment, also called a subobject, within a polyline by pressing the Ctrl key when you click it.
If the selected object is a spline, line, or an arc, the following prompt is displayed:

Object selected is not a polyline.

Do you want it to turn into one? <Y>: Enter y or n, or press Enter

If you enter y, the object is converted into a single-segment 2D polyline that you can edit.

Before the selected spline is converted to a polyline, the following prompt is displayed:

Specify a precision <10>: Enter a new precision value or press Enter

The PLINECONVERTMODE system variable determines whether the polylines are created with linear or arc segments. When the PEDITACCEPT system variable is set to 1, this prompt is suppressed, and the selected object is automatically converted to a polyline.
Edit the polyline by entering one or more of the following options:
- Enter c (Close) to create a closed polyline.
- Enter j (Join) to join contiguous lines, splines, arcs, or polylines.
- Enter w (Width) to specify a new uniform width for the entire polyline.
- Enter e (Edit Vertex) to edit a vertex.
- Enter f (Fit) to create a series of arcs joining each pair of vertices.
- Enter s (Spline) to create an approximation of a spline.
- Enter d (Decurve) to remove extra vertices inserted by a fit or spline curve and to straighten all segments of the polyline.
- Enter L (Ltype Gen) to generate the linetype in a continuous pattern through the vertices of the polyline.
- Enter r (Reverse) to reverse the order of vertices of the polyline.
- Enter u (Undo) to reverse actions back to the start of PEDIT.
Enter x (Exit) to end a command option. Press Enter to exit the PEDIT command.

To reverse lines, polylines, splines, or helixes

To join polylines, splines, lines, and arcs into a single polyline

To delete a vertex in a polyline

To taper the width of individual polyline segments

Commands

System Variables