Any manipulations with the unit properties or its database are logged in the system automatically. In addition, records can be added to the unit log manually — through the event registrar. To see the unit log or add messages to it, you should have not only the Query reports or messages access but also Manage log.
Any changes in the unit properties are logged, as well as import, export, and removal of messages, assignment or reset of a driver. etc.
The log contains the following information:
Unit log can also presented as a report.