Options on the TrainPlayer Preferences Display tab:
Switch
Display: Open/closed lights: by default, the program displays both red
(closed) and green (open) indicators at all routes through every switch.
You may uncheck one or the other if you wish to light only the closed routes
or only the open ones. You may also change the indicator colors from red and green to colors of your choice.
The diagram at right shows a few of the possible variations on switch display.