How to Join Objects in AutoCAD: Simple Steps Explained

In AutoCAD, you can join objects by using the JOIN command, which combines lines, arcs, polylines, and other connected objects into a single object. Simply type JOIN, select the objects you want to combine, and press Enter to merge them.

Syntax

The basic syntax for joining objects in AutoCAD is:

JOIN [objects]

Here:

• JOIN is the command to combine objects.
• [objects] are the lines, arcs, or polylines you select to join.

The objects must be touching or overlapping to join successfully.

autocad command

JOIN

Example

This example shows how to join two connected lines into a single polyline.

autocad command

Command: JOIN
Select objects: (select two connected lines)
Press Enter
Result: Lines are joined into one polyline

Output

Two separate lines become one continuous polyline after the JOIN command.

Common Pitfalls

Common mistakes when joining objects include:

• Trying to join objects that are not touching or overlapping.
• Joining objects of incompatible types (e.g., a circle and a line).
• Not selecting all objects before pressing Enter.

To fix these, ensure objects share endpoints and are compatible types like lines and arcs.

autocad command

Wrong way:
Command: JOIN
Select objects: (select two lines with gap)
Press Enter
Result: Objects not joined

Right way:
Command: JOIN
Select objects: (select two lines touching at endpoint)
Press Enter
Result: Objects joined

Output

First attempt fails due to gap; second attempt succeeds because lines touch.

Quick Reference

Step	Action
1	Type JOIN in the command line
2	Select objects to join (lines, arcs, polylines)
3	Press Enter to complete the join
4	Verify objects are joined into one polyline

Key Takeaways

Use the JOIN command to combine connected lines, arcs, or polylines into one object.

Objects must touch or overlap to join successfully.

Only compatible object types can be joined.

Select all objects before pressing Enter to complete the join.

Check the result to ensure objects merged as expected.