Reverting to the Last Checked-In Version of a Model 
While working on a checked-out model, you can revert to the last checked-in version of the model to cancel all changes that you have made since checking out the model.
Prerequisites
The model whose changes you want to cancel is checked out by you, and it is currently the active model in Storyboard.
Procedure
Choose
Source Control 
Revert 
.Click Yes to the displayed prompt.
Result
The version of the model that you are working on is discarded and reverts back to the previously checked in version. All content changes made after the model was checked out are cancelled. The model icon in the Manage Models task panel changes to indicate that the model is checked in.
Note
If the model was open while you reverted it, the open version is no longer synchronized with the version that is checked in. For more information, see Synchronizing a Model.