The browser view of a Pool element can have a large number of inputs and outputs(depending on which boxes are checked in the dialog, and how many Inflows and Outflow Requests you have). If the Upper and Lower Bound boxes are checked, the browser view looks like this:
The names for the individual Outflows are user-defined.
Note: Element inputs and outputs are
only shown in the browser if you choose to Show Element Subitems
(accessed via the browser context menu by right-clicking in the
browser).