About the No Value Option

Role Availability Read-Only Investigator Analyst Manager

The [No Value] option is a special value available for some filters. Use this value when you want to filter items that do not have the filter property defined or do not match the other defined property values in the filter. You can use the No Value option with other filter criteria and apply this value to an individual filter. (For example, you can use this filter for filtering alarms without labels.)

Click No Value in the alarm main page