AutoCAD

How to Split Polyline in AutoCAD?

Understanding Polylines in AutoCAD

Polylines are essential components in AutoCAD, allowing for the creation of complex shapes and paths through connected segments. They can be manipulated in various ways, including splitting them into separate entities. This article elaborates on how to effectively split a polyline in AutoCAD 2025.

Step-by-Step Guide to Splitting a Polyline

Step 1: Activate the Break Tool

Begin by navigating to the Home tab on the command ribbon. Look for the Modify panel and locate the Break tool. Clicking on it activates the command allowing you to split polylines and other geometrical objects.

Step 2: Select the Polyline

With the Break tool activated, click on the polyline that you wish to split. The initial point where you click becomes the first break point. Ensure that the chosen segment of the polyline is clearly visible and accessible for manipulation.

Step 3: Defining the Break Point

After selecting the polyline, specify where you would like the split to occur. This is done by clicking at the desired location on the polyline. If you want to create a precise break without any gaps, input the command @0,0 when prompted.

Step 4: Confirm the Split

Once you have defined both break points, press Enter to confirm the action. The polyline will now be split at the points you selected, allowing for further editing or adjustments as needed.

Splitting a 3D Polyline in AutoCAD

The process for splitting a 3D polyline follows similar steps but considers the three-dimensional aspect of the object.

Step 1: Choose the 3D Polyline

Select the 3D polyline you intend to modify by clicking on it.

Step 2: Specify Break Points

Identify the first break point by selecting the desired location on the polyline. Then, choose the second break point as necessary.

Step 3: Execute the Split Command

Press Enter to apply the split after confirming your selections. The polyline will be divided at the specified points, retaining its 3D properties.

Breaking Multiple Lines

To split several lines simultaneously, follow this streamlined process.

Step 1: Command Entry

Type BREAK into the command line or select the Break tool from the Modify panel.

Step 2: Select the Lines

Click on the lines you wish to split.

Step 3: Define First Break Point

Type F for the first point and select the location from which the split should begin.

Step 4: Input Offset Distance

Provide the distance for the break by entering it as an offset. For example, enter @12,0 to break the line at the specified distance from the first point.

Frequently Asked Questions (FAQ)

1. How can I undo a split action in AutoCAD?
You can use the Undo command by pressing Ctrl + Z or typing U in the command line immediately after performing the split.

2. Can I convert a split polyline back into a single line?
Yes, you can use the Join command to merge multiple segments of a polyline into a single entity if they are adjacent to each other.

3. How do I ensure my break points are accurately placed?
Utilize the Snap and Grid features in AutoCAD for precise positioning while selecting break points for your polylines.

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.