You can view the internal structure of the design netlist, either after fitting or after Analysis & Synthesis, with the Technology Map Viewer. To view the post-fitting view of the schematic, you must first perform a full compilation, and then choose the Technology Map Viewer (Post Fitting) command. To view the post-mapping view of the schematic, you must first perform Analysis & Synthesis, and then choose the Technology Map Viewer (Post-Mapping) command.