We need a button we can click that will explain what things mean. I looked up directions to and from a location. On the return route parts of the line that shows you where you are driving is in yellow instead of all blue. I have no idea what that means. I've tried searching for color code explanations to yahoo maps on the internet with no success. I am worried about what that means. Will I need an alternate route due to construction or something? What? I have to write directions on paper as I do not have the convenience of a cell or GPS device.