Is there a comprehensive reference to what some of the screen symbols mean? For example, using fuel prices, there are several colors of icons by the station names, possibly indicating how far they are from your route or maybe how old the price info is. Another example is a symbol appeared the other day in the upper left of my screen which looked like a red pennant. It was very windy that day and i figured it was for wind advisory. But there is nothing in the documentation or online that i can find.