Hi experienced users, I have just started learning design with easyEda for few days. I have a question: If we could save a schematic module as a "blackbox" with only input and output ? For example: I have a circuit called Full-adder, how could I save it "as a module" with a symbol with 3 input, 2 output, and make sure that I could use the "symbol" in simulation?  (I would like to make a circuit like this, with (1, 2, 3) = (A, B, Cin) and (4, 5) = (Sum, Cout):  ) Many thanks for your helps