Adding Hierarchy
Tie the project together with a top-level schematic that includes macros from all the Foundation Design Entry Tools
As each element of the project is created, make a symbol to represent the macro so that it can be added to the top-level schematic
Before a symbol can be created to represent a schematic macro, the macro must contain I/O Terminals that represent ports on the symbol
To enter an I/O Terminal, click on its icon, enter the terminal name, select the type of port, place it, and wire it up.