Some devices in the system have extra events, called Device Events. The device event filter allows you to search for records of these events.
To add the filter, click on Manage Filters, then click on the Device Event tab.
To activate the filter, simply click on the checkbox to the right of the filter.
You can select the devices you want to filter, as well as the type of device event. Select the items you want by dragging from the left list to the right list.