A black box is a generic symbol that you can use to represent any device. Black boxes
save time when you do not need a new unique symbol. Black boxes are rectangular and can have
editable pins associated with them.
You can insert black boxes in Schematic or Mixed scheme drawing types.
Connection Points for Black Boxes
On each intersection between a wire and the black box outline, a connection point is
inserted that represents the device terminal. According to the configuration
settings, you can have a basic connection point (the terminal number is text) or an
oriented connection point with attributes.