Adding Input and Output Pins to the Hierarchy/Statement Block

Data flow between the various hierarchy levels or statement block levels works via input and output pins. These are simply connection lines that extend across the levels.

Right-click the hierarchy/statement block.
Select Add Inpin or Add Outpin from the context menu.
You can add any number of input and output pins to the hierarchy/statement block. The input and output pins are represented by arrow symbols containing the pin name inside the block.