Snapshot 

A snapshot freezes the current status of the data area. After you have made a snapshot, you can continue to work normally with the data for the database instance and make changes to the data. You can later return to the frozen data area state or copy all changes since the snapshot.

See also:

Concepts of the Database System, Freezing the Data Area (Snapshot)

Database Manager GUI, Freezing the Data Area (Snapshots).