So every time you go out and run up and down the lake Lowrance saves that boat run/trail. In fact I'm reluctant to call it a Trail because that may be something else. I have no idea how to clear those runs/trails out. Will anybody give me the steps to delete them? I have so many now I can hardly see any blue underneath because of the clutter. I am not able to move through the menu to figure it out and I am lazy soI am trying to avoid going back to the owners manual to look it up.