Every object or adapter in your environment has an icon representation. You can customize how the icon appears.
vRealize Operations Manager assigns a default icon to each object type and adapter type . Taken collectively, object types and adapter types are known as objects in your environment. Icons represent objects in the UI and help you to identify the type of object. For example, in the Topology Graph widget on a dashboard, labeled icons show how objects are connected to one other. You can quickly identify the type of object from the icon.
If you want to differentiate objects, you can change the icon. For example, a virtual machine icon is generic. If you want to pictorially distinguish the data that a vSphere virtual machine provides from the data that a Hypervisor virtual machine provides, you can assign a different icon to each.