History tab
In this tab, you can specify the scope and settings of the History feature.
In the History scope section, select the components for which the history of changes should be recorded and displayed on the Home Portal. Double-click on the component to move it to the Selected Items or Available Items list. You can also select a component and click the Add or Remove buttons to move it between the lists.
From the Keep History for dropdown list, select the time period for which the history should be kept. The available periods are:
one month.
three months.
six months.
one year.
(For on-premise clients) Click the Purge history button to remove all history entries.
You can limit access to the History tab for specific user groups in the 
Configurartion menu > User Management > User Groups and Rights.
Warning
Gathering large amounts of historical data can slow down your system. To avoid this, you can just select some of the available components or schedule monthly cleanups.