HELP❗️ – Orient Express: The Train Simulator Review

There is no light thing on the top of the screen! I looked at the help area and I built the lay out. But where is the light thing on the top the signal! I am on 7.1 and I can't find the singal on the top of the screen! But I say it's the best train set up out there keep it up❗️
Review by WorldPocketMaps on Orient Express: The Train Simulator.