How to Edit a Polylines in AutoCAD

A polyline can be altered after you have already made it. While editing a polyline in AutoCAD, the software provides you with a variety of options. From there on you can alter your already created object as per your design requirements. This way you do not have to remake or edit the polyline if you wish to make just a minor adjustment to it.


Step # 1 – Select the “Edit polyline” option

Draw a shape with the “Polyline” tool. Pick the “Edit polyline” tool from the extended options in the “Modify” panel and select the object to be edited.

Choose the “Edit polyline” option

Step # 2 – Open/Close the polyline

As you do, a list of options appears for you to choose from. You can open or close the polyline by selecting the respective option.

Open/Close the shape

Step # 3 – Curve the polyline

Curving a linear polyline as per your requirement is fairly easy. For this, simply select the “Spline” option in the edit menu.

Curve the object

Step # 4 – Decurve the polyline

If you wish to make it return to a linear shape press the “decurve” option. You can also “undo” your previous action from here.

Decurve the object

Step # 5 – Select the “Edit vertex” option

To further edit the shape through its different vertexes, press the “Edit vertex” option.
This now provides you with a new set of options. You can move around to whichever vertex you wish by pressing either “Next” or “Previous”.

Alter the “Edit vertex” option

Step # 6 – Straighten the vertexes

Curved vertexes can be made linear and several vertexes can be combined into a continuous line using the “Straighten” option. Click on the option, specify the vertexes and press “Go”.

Straighten the different vertexes

Step # 7 – Add more vertexes

More vertexes can be added from the “Insert” option. Select it and draw more points in whichever direction you wish.

Insert vertexes

Step # 8 – Move existing vertexes

Similarly, positions of existing vertexes can also be changed using the “Move” option. This way you do not have to erase a whole polyline as a result of the wrong positioning of one vertex.

Alter the position of existing vertexes

Step # 9 – Create a gap

The polyline in AutoCAD can be broken by creating a gap in between. For this, select “Break” and then specify the vertexes between which you want to create a gap. Click “Go” once you have specified the vertexes.
Since you broke the polyline so when you select it now, it will be selected differently as it is now divided into different portions.

Make a gap

Step # 10 – Alter the width

The width of the polyline in AutoCAD can also be altered. Select the object again from the “Edit polyline” option and from the options listed now choose “Width”. Specify its value and the width will increase accordingly.

Modify the width