I am new to this EasyEDA design package and like a lot of people, I suspect, get confused about how to add components to the library for use in the schematic and PCB design. How does one go about getting this particular schematic and model from the LCSC web site into the schematic design at the bottom? All I want to do is replace the two 4 digit displays in that schematic with two of the 3 digit displays. I am at a loss for how to do this....