OFFSET command in AutoCAD - Step-by-Step Guide

Introduction

The OFFSET command in AutoCAD helps you create a copy of a selected object at a specified distance. It is useful when you want to make parallel lines, concentric circles, or duplicate shapes quickly without redrawing.

When you need to draw a road lane parallel to an existing lane line.

When creating a border inside or outside a shape like a rectangle or circle.

When designing floor plans and you want walls offset by a certain thickness.

When you want to create multiple parallel lines for electrical wiring diagrams.

When you need to duplicate a shape at a fixed distance for layering or detailing.

Steps

Step 1: Type OFFSET and press Enter

- Command line

AutoCAD prompts you to specify the offset distance

💡 You can also click the Offset icon on the Modify panel of the Home tab

Step 2: Type the desired offset distance and press Enter

- Command line

AutoCAD prompts you to select the object to offset

Step 3: Click the object you want to offset

- Drawing area

AutoCAD highlights the selected object

Step 4: Click the side where you want the offset copy to appear

- Drawing area

A new object is created parallel or concentric at the specified distance

Step 5: Repeat steps 3 and 4 to create more offsets or press Esc to exit

- Drawing area or Command line

You can create multiple offset copies or finish the command

Before vs After

Before

A single line segment 100 units long is drawn on the screen

After

A new line segment parallel to the original appears 10 units away

Settings Reference

Offset Distance

📍 Command line after starting OFFSET command

Sets how far the new object will be from the original

Default: No default; user must enter a value

Erase Source Object

📍 After selecting offset side, type E and press Enter

Decides if the original object is deleted after offset

Default: No

Common Mistakes

Entering zero or negative offset distance

Offset distance must be a positive number to create a visible copy

Always enter a positive number for the offset distance

Clicking the wrong side for offset

The offset copy appears on the side you click, so wrong side means wrong placement

Carefully click the side where you want the new object to appear

Not pressing Esc to exit after finishing

The command stays active and may cause confusion or extra objects

Press Esc to end the OFFSET command when done

Summary

The OFFSET command creates a copy of an object at a set distance.

It is useful for making parallel lines, borders, or concentric shapes quickly.

Remember to enter a positive distance and choose the correct side for the offset.

Practice

1. What does the OFFSET command do in AutoCAD?

easy

A. Creates a parallel copy of an object at a specified distance

B. Deletes the selected object

C. Changes the color of an object

D. Rotates the object around a point

Solution

1. Step 1: Understand the purpose of OFFSET

   The OFFSET command is designed to create a copy of an object parallel to the original at a set distance.

2. Step 2: Compare with other commands

   Deleting, changing color, or rotating are different commands and do not describe OFFSET.

3. Final Answer:

   Creates a parallel copy of an object at a specified distance -> Option A

4. Quick Check:

   OFFSET = parallel copy [OK]

Hint: OFFSET makes parallel copies at set distances [OK]

Common Mistakes:

• Confusing OFFSET with DELETE command
• Thinking OFFSET changes object color
• Assuming OFFSET rotates objects

2. Which is the correct sequence to use the OFFSET command in AutoCAD?

easy

A. Specify distance, select object, choose side

B. Choose side, select object, specify distance

C. Select object, specify distance, choose side

D. Select object, choose side, specify distance

Solution

1. Step 1: Recall OFFSET command steps

   First, you select the object to offset, then specify the distance, and finally choose the side to place the offset.

2. Step 2: Verify the order

   The correct order is select object, specify distance, then choose side. Other orders do not match the command flow.

3. Final Answer:

   Select object, specify distance, choose side -> Option C

4. Quick Check:

   Object -> Distance -> Side [OK]

Hint: Select object first, then distance, then side [OK]

Common Mistakes:

• Specifying distance before selecting object
• Choosing side before selecting object
• Mixing up the order of steps

3. Given a line segment of length 10 units, if you use OFFSET with distance 2 units to the right side, what will be the length of the new line?

medium

A. 12 units

B. 10 units

C. 8 units

D. Cannot determine without angle

Solution

1. Step 1: Understand OFFSET effect on length

   OFFSET creates a parallel copy at a set distance but does not change the length of the original object.

2. Step 2: Apply to the line segment

   The new line will be parallel and same length (10 units), just shifted 2 units to the right.

3. Final Answer:

   10 units -> Option B

4. Quick Check:

   Length unchanged by OFFSET [OK]

Hint: OFFSET copies length unchanged, only shifts position [OK]

Common Mistakes:

• Assuming length increases by offset distance
• Thinking offset changes object size
• Confusing offset distance with length

4. You tried to use the OFFSET command but AutoCAD gave an error. Which of these is the most likely cause?

medium

A. You entered a negative distance value

B. You did not select an object before specifying distance

C. You chose the wrong side to offset

D. You specified zero as the offset distance

Solution

1. Step 1: Check valid distance values

   OFFSET distance must be a positive non-zero number; zero distance is invalid and causes errors.

2. Step 2: Analyze other options

   Negative distances are allowed to offset in opposite direction; selecting object before distance is not required; side choice does not cause errors.

3. Final Answer:

   You specified zero as the offset distance -> Option D

4. Quick Check:

   Zero distance causes error [OK]

Hint: Offset distance cannot be zero [OK]

Common Mistakes:

• Using zero as offset distance
• Thinking negative distance is invalid
• Not selecting object first (allowed)
• Believing side choice causes errors

5. You want to create a wall border 0.5 meters thick around a rectangular floor plan using the OFFSET command. The floor plan is a closed polyline. Which steps should you follow to achieve this correctly?

hard

A. Use OFFSET with 0.5 distance, select the polyline, then pick outside side

B. Use OFFSET with 0.5 distance, select the polyline, then pick inside side

C. Use OFFSET with 1.0 distance, select the polyline, then pick outside side

D. Use OFFSET with 0.5 distance, select each line separately, then pick outside side

Solution

1. Step 1: Set correct offset distance

   The wall thickness is 0.5 meters, so OFFSET distance should be 0.5.

2. Step 2: Select the entire floor plan polyline

   Selecting the closed polyline ensures the offset creates a border around the whole shape.

3. Step 3: Choose the outside side

   To create a border around the floor, offset must be outside the original polyline.

4. Final Answer:

   Use OFFSET with 0.5 distance, select the polyline, then pick outside side -> Option A

5. Quick Check:

   Offset 0.5 outside polyline for wall border [OK]

Hint: Offset closed shape outside by wall thickness [OK]

Common Mistakes:

• Offsetting inside instead of outside
• Using wrong offset distance
• Offsetting lines separately instead of whole polyline