AutoCAD

How to Change Line to Polyline in AutoCAD?

Steps to Convert a Line to a Polyline in AutoCAD

Changing a line to a polyline in AutoCAD is straightforward, and it can be done using the Polyline Edit tool. Below is a detailed guide on how to perform this task effectively.

Step 1: Initiating the Polyline Edit Command

Start by opening your AutoCAD workspace where the line you wish to convert is located. Type PEDIT into the command line and hit the Enter key. This command activates the Polyline Edit feature that allows you to modify polylines.

Step 2: Selecting the Line

Once the command is activated, you will need to select the line you want to convert. You can do this by clicking directly on the line within your drawing. After selecting the line, press Enter to confirm your selection.

Step 3: Convert to Polyline

The command prompt will present you with several options. To convert the selected line into a polyline, type M, which stands for “Multiple”, then press Enter. This allows you to modify the selected line.

Step 4: Closing the Command

After you have modified the line settings, press Enter once more to finalize the conversion to a polyline. The line is now a polyline and will retain this format during further modifications.

Step 5: Joining Segments (if necessary)

If the line was previously part of multiple segments, you may want to join them. To do this effectively, type J for “Join” and press Enter, then select the objects you wish to join together.

Step 6: Completing Your Task

Once you are done with your modifications and joins, simply press Enter again to conclude the operation. Finally, press Esc to exit the command.

Understanding Polylines

Polylines are beneficial tools in AutoCAD because they allow for the creation of complex shapes using a singular entity. Unlike individual lines, polylines maintain continuity and are treated as a single object, which simplifies many operations and modifications.

Additional Polyline Functions

  • Creating a New Polyline: You can create new polylines directly by selecting the Polyline tool from the Draw panel. Specify points to define the shape.
  • Simplifying a Polyline: If a polyline has too many vertices, it can be simplified for clarity. Use the Simplify Polys function found under the Modify menu.

FAQ Section

Q1: What is the difference between a line and a polyline in AutoCAD?

A line is a standalone segment that exists independently, while a polyline is a continuous sequence of connected line segments treated as a single object, which can streamline the drawing and editing process.

Q2: Can I convert arcs and splines to polylines using the same method?

Yes, you can convert arcs and splines to a polyline using the same PEDIT command. Select the arc or spline and then follow the conversion steps as outlined above.

Q3: Why would I want to use polylines instead of individual lines?

Polylines provide benefits such as maintaining vertices’ connectivity even after modifications, allowing for consistent thickness across the shape, and offering advanced editing options like joined vertices. This makes them preferable for many types of drawings and designs in AutoCAD.

About the author

Wei Zhang

Wei Zhang

Wei Zhang is a renowned figure in the CAD (Computer-Aided Design) industry in Canada, with over 30 years of experience spanning his native China and Canada. As the founder of a CAD training center, Wei has been instrumental in shaping the skills of hundreds of technicians and engineers in technical drawing and CAD software applications. He is a certified developer with Autodesk, demonstrating his deep expertise and commitment to staying at the forefront of CAD technology. Wei’s passion for education and technology has not only made him a respected educator but also a key player in advancing CAD methodologies in various engineering sectors. His contributions have significantly impacted the way CAD is taught and applied in the professional world, bridging the gap between traditional drafting techniques and modern digital solutions.