Revert a model
A model can be reverted to the last saved or last opened status, or a version at a given date and time.
Revert to last saved/opened
When a model has unsaved changes:
- 
                                                        
Select File > Revert To > Last Opened or Last Saved.
 - 
                                                        
Close a model and click .
The model reverts to Last Saved.
 
Revert to a previous version
If you want to revert a model to a version at a specific date and time:
- Select File > Revert To > Browse All Versions...
 - Select a date and time in the file version history.
 - Click .