AutoCAD

How To Unblock In AutoCAD 2021?

Understanding Block Functions in AutoCAD 2025

Working with blocks in AutoCAD is essential for efficient drafting. Whether you need to edit, reset, or unblock them, understanding the various functionalities will enhance your workflow. This guide focuses on the steps required to unblock a block in AutoCAD 2025, along with related actions.

Steps to Unblock a Block in AutoCAD 2025

  1. Open the Block Editor:

    • Begin by selecting the block you wish to modify.
    • Right-click on the block and choose "Edit Block" to enter the Block Editor. Alternatively, you can double-click the block to activate the editor.
  2. Ensure Nothing is Selected:

    • Once in the Block Editor, make sure that no objects are currently selected. This will allow you to access all properties of the block without interference from other items.
  3. Access the Properties Palette:

    • If the Properties palette is not visible, press Ctrl + 1 to open it. This palette contains all the settings related to the selected block.
  4. Modify the Allow Exploding Setting:

    • In the Properties palette, scroll down until you find the section labeled "Block."
    • Locate the "Allow Exploding" option. Click on it to reveal a drop-down menu.
    • Change this setting to "Yes." This adjustment will enable the block to be exploded later on.
  5. Save Changes:
    • After modifying the properties, save your changes by clicking on the "Save Block Definition" option found on the Block Editor toolbar. This step ensures that your changes take effect.

Other Useful Block Functions

Resetting a Block

  1. Select the block you want to reset.
  2. Right-click and choose “Reset Block” from the context menu.
  3. Alternatively, you can type the command RESETBLOCK in the command line and select all block references you wish to reset. This command will restore the selected blocks to their original state.

Editing a Block

  1. Navigate to the Home tab and find the Block panel.
  2. Click on "Create" and select the block you want to edit.
  3. Assign a name for the new block definition in the Edit Block Definition dialog box and hit "OK."
  4. Make your changes in the Block Editor.
  5. Save your block once completed.

Frequently Asked Questions

How do I explode a block in AutoCAD 2025?
To explode a block, ensure that the "Allow Exploding" property is set to "Yes." Then select the block and type the command EXPLODE in the command line, which will allow you to break the block into its constituent parts.

Can I revert changes made to a block?
Yes, you can revert changes by either using the Undo command or by resetting the block back to its original definition through the RESETBLOCK command.

What should I do if a block is still not exploding after changing the settings?
If a block remains unresponsively despite enabling the "Allow Exploding" option, check if there are nested blocks or other restrictions that might be preventing the action. Also, ensure that the block is not locked or has any other setting that restricts modifications.

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.