To work offline on an enterprise industry model
-  In the Maintenance workspace, open an enterprise industry model project. 
 
- Zoom to an area where you want to work. 
 
- Click . 
 
 – Optionally, click the Online/Offline toggle on the Status Bar. This option allows you to save the edit set and continue at a later time. 
 Tip: You could also save the edit set to a new drawing where you can make changes. Later, you could go online and merge the changes. 
  
To return online when working on an enterprise industry model
 – Click the Offline/Online toggle on the Status Bar.  
- Click . 
The Merge Changes dialog box is displayed. 
 Tip: Data needs to be checked for conflicts before it can be checked in. Any conflicts must be resolved before your changes are added to the database. 
  
- When done marking changes, click Check In All.