How Do I Edit a Block Definition in AutoCAD?

AutoCAD is a powerful software that allows you to create and edit designs with precision. When working on a project, you may come across the need to modify a block definition.

Editing block definitions in AutoCAD is a fundamental skill that can save you time and effort in your design process. In this tutorial, we will guide you through the steps of editing a block definition in AutoCAD.

Step 1: Access the Block Editor

To begin editing a block definition, you first need to access the Block Editor. There are multiple ways to do this:

  • Method 1: Type “BEDIT” in the command line and press Enter.
  • Method 2: Go to the “Insert” tab in the ribbon, click on “Block Definition” panel, and then select “Block Editor”.


If you are working with an existing block reference, you can also double-click on it to directly enter the Block Editor.

Step 2: Make Changes to the Block Definition

Once you are inside the Block Editor, you can make various modifications to the block definition. These changes can include:

  • Adding or removing objects: You can add or remove objects within the block definition using standard AutoCAD commands like “Copy”, “Move”, “Delete”, etc.
  • Modifying object properties: You can change properties of individual objects such as color, linetype, layer, etc., using AutoCAD’s property palette or by selecting and right-clicking on an object.
  • Edit attributes: If your block contains attributes, you can modify their values by double-clicking on them and entering new information.

Step 3: Save and Exit the Block Editor

After making the necessary changes to the block definition, it’s time to save your work and exit the Block Editor. To do this, follow these steps:

  1. Method 1: Type “SAVE” in the command line and press Enter. Then type “CLOSE” in the command line to exit the Block Editor.
  2. Method 2: Click on the “Save” button in the Block Editor ribbon. Then click on the “Close Block Editor” button to exit.

Congratulations! You have successfully edited a block definition in AutoCAD. The changes you made will be reflected in all instances of that block within your drawing.


If you are working with a drawing that contains multiple block references of the same block, editing its definition will affect all instances of that block.

In conclusion, being able to edit block definitions in AutoCAD is a valuable skill that allows you to customize your designs and improve your workflow. By following the steps outlined in this tutorial, you can confidently make changes to block definitions and create more dynamic drawings.