The default PCB View shows all components with more that 60 pins and all connectors. Connectors that connect to other boards in your design, components, FPGAs and connectors which are being viewed in the Netlist view show a different icon. In this view you can add an user label to components, or add an FPGA definition.
Each FPGA will also appear as a separate schema with only one component. On the board that contains the FPGA the pins show the net names. On the FPGA (board) they will show the pin list or constraints extracted from the FPGA file.
From the PCB view you select for which board you want to see the Netlist or Connection trace.