The Netlist Viewer is a graphical user interface that displays different views for the different stages of the design process:
Figure 1. Netlist Viewer — RTL View

Figure 2. Netlist Viewer — Hierarchical Post-Synthesis View

Figure 2. Netlist Viewer — Flat Post-Compile View
Note: A progress bar indicates that the flattened netlist is being loaded. For a large netlist, the loading may incur some runtime penalty. A Cancel button is available to cancel the loading.
Figure 4. Netlist Viewer — Flat Post-Compile Cone View