Understanding and Using the PURGE Command in AutoCAD

The PURGE command in AutoCAD is a powerful tool for cleaning up your drawings by removing unused objects and definitions. This can significantly improve drawing performance, reduce file size, and enhance overall drawing organization.

How to Use the PURGE Command:

1. Start the Command: Type PURGE on the command line and press Enter.

2. Select Purge Options: AutoCAD will display a dialog box with various options:

   • Purge All: Removes all unused objects and definitions.
   • Purge Named Objects: Allows you to specify specific objects or definitions to purge.
   • Purge Unused Blocks: Removes blocks that are not referenced in the drawing.
   • Purge Unused Layers: Removes layers that do not contain any objects.
   • Purge Named Objects: Removes specific named objects, such as blocks, layers, and text styles.

3. Select Options: Check the desired options and click OK.

Example: Purging Unused Blocks

1. Insert Multiple Blocks: Insert several blocks into your drawing.
2. Delete Some Blocks: Delete some of the inserted blocks.
3. Start the PURGE Command: Type PURGE and press Enter.
4. Select “Purge Unused Blocks”: Check this option.
5. Click OK: AutoCAD will remove the unused block definitions from the drawing.

Example: Purging Unused Layers

1. Create Multiple Layers: Create several layers and assign objects to them.
2. Delete Objects from Layers: Delete objects from some of the layers.
3. Start the PURGE Command: Type PURGE and press Enter.
4. Select “Purge Unused Layers”: Check this option.
5. Click OK: AutoCAD will remove the layers that no longer contain any objects.

Additional Tips:

• Regular Purging: It’s a good practice to purge your drawings regularly to maintain performance and file size.
• Selective Purging: Use the “Purge Named Objects” option to selectively remove specific objects or definitions.
• Caution with Purging: Be cautious when purging objects, as you cannot undo this operation.
• XREFs and External References: When working with external references, be careful not to purge objects that are still referenced by other drawings.
• Layer Organization: Organize your layers effectively to minimize the need for purging unused layers.

By using the PURGE command effectively, you can optimize your AutoCAD drawings, improve performance, and maintain a clean and organized workspace.