And some further meanderings on a totally off topic trek...
This flow regulator panel shows a white status light. The quick-access menu on the left has filled with two ports that have 'Notify Operator' status (port 15 and port 3). Other ports can be reached from the 'port' button. Port 15 is the culprit of the white status flag, and pressing the '15' menu item produces the displayed sub-menu, where we see that flow through port fifteen has exceeded maximum set point. All this with only one keypress from the user.
Port 3 is a lower priority notification, and examination results in the discovery that the port three flow regulator is scheduled for routine maintenance.
Make sense to you?
