A snapshot is a read-only view of a schedule and its Gantt chart, which represents the schedule data when the snapshot was taken. You can compare snapshots to other snapshots and to scenarios.
You can create a snapshot from the Select Action menu or by using the Create Snapshot toolbar button.
A snapshot is also created when a scenario is published.
You can view and delete snapshots in the Manage Snapshots and Scenarios window, available from the Select Action menu.