This image shows a portion of the Assign Servers to Clusters screen. There are two panes. The left pane (Servers) lists the AdminServer only. The right pane (Clusters) shows an open Cluster folder. Under it are 4 cluster elements: fmw_Machine_1, fmw_Machine_2, fmw_Machine_3, and fmw_Machine_4.

Nested under the fmw_Machine elements are server elements.