Compare-Align and Repository Snapshots
Repository snapshots are used in The Compare-Align function of two object states over time.
They enable determination of what has changed on an object, other than a diagram, related to an earlier state of the same object.

The compare and align functionality allows you to reverse certain object modifications.
To compare and align two versions of the same object:
1. Right-click the object and select Manage > Compare and Align.
2. In the Select the comparison method dialog box, select Two archived states from the current repository.
3. Click Next.
4. In the Source Repository Archived State field, click the arrow and select Archived State.

The source repository serves as reference for comparison and alignment.
5. Using the archived state selection mode wizard, select a repository state associated with an object of the following type:
• repository snapshot
• dispatch
• design task
6. In the Target Repository Archived State field, select Current State.

You can also select
Current Transaction Initial Archived State to select the repository state at the moment you opened the transaction.

To compare all objects of a repository, select the
Compare All Repository Objects check box.
7. Click Next until reaching Finish.
The destination state is aligned with the archived origin state: the object has returned to its earlier state.