In this example, we build a large net with arrows to indicate the location of the baseline.
i1 : x = "x" | "3"^1 3 o1 = x o1 : Net
i2 : "<--- " | ( x || "" || x ) | " --->" 3 o2 = <--- x ---> 3 x o2 : Net
See also ||, |, Net, and stack.