Converts components or folders to external references, by moving their definitions from the current drawing to a new drawing. 
List of Prompts
The following prompts are displayed. 
- Local object to externalize 
 
- Specifies the type of object to externalize. You can choose between component, folder, and annotation view. 
 
-  Component/Folder name to externalize 
 
- Specifies the name of the component or folder to externalize. 
Note: If you can't remember the name of the component or folder, type ? and then press ENTER. 
 
 
- ?
 
- Lists all items the names of objects that can be externalized. You can type the first few characters of the item name followed by a wild card (*), and then press ENTER to list only those components that begin with those characters.