Top-Level Nodes Tab

This displays a legend of icon types followed by a count (in parentheses) of how many of each appear in the topology. The switch at the bottom of this panel centers the display around the selected icon.

Click the plus (+) to the left of the inventory category icons to display a list of devices in that category in the topology. Click on a list item to highlight that device and its network connection in the topology view. A colored glow highlights it and its network connection(s). The listed inventory changes if you drill in. 

The listed text appears in the alarm color of the device. See Alarms in Visualizations / Topologies.