I'm quite new to EAGLE, and want to learn to do something, but don't know its name. All I can do is describe it.
I have a .sch file that I want to put in a bigger, system-level .sch file. However, I don't want to just copy (excuse me, cut) and paste it, I want to put my little .sch into a nice package (a rectangle with pins on it) so that the system-level .sch isn't as cluttered. In other CAD software they're sometimes called "modules", I think.
So I've attached a picture of what I want the end result to look like - this particular one is an Arduino Mega, which is full of stuff, but has been made into a nice little package, so that it can be put into a higher-level schematic.
Does anyone know what I'm talking about?