Editing existing engine elements
You can change the properties of an individual engine element or the common properties shared by several engine elements.
Existing engine elements are shown in the Home view under engine-specific branches. Firewall, IPS, and Layer 2 Firewall elements are shown in the Configuration view under the NGFW Engines branch. Changing the common properties of several engine elements restricts you to actions and values that are applicable to all engine elements at the same time. You can also convert a Single Firewall, a Single IPS engine, or a Single Layer 2 Firewall into a cluster.