Down Stream. The Down Stream option is useful when you have a error at one station, but the rest are accurate. Normally, you would adjust the station with the error and then all the stations beyond would have to be moved about the same amount.. This can be very tedious, especially if there are many stations beyond.
To solve that problem, the program has the Down Stream option. When the Down Stream option is enabled, all the stations "downstream" from the one being dragged, move together.
The program decides which stations are "downstream" by analyzing the structure of the surveys and loops in the area. In some cases, the wrong stations will move. If this happens, simply disable the option, and move the stations by one at a time.