Choose Navigation Controls from main Map Options screen to filter various buttons you see on your map. These include Depth Gauge/Finder, Speedometer, Compass, Scale & Zoom Controls.
Here you can set the Auto Heading Line, which automatically turns on the heading line when you start a voyage or track. To manually toggle the heasing line on/off tap the location indicator on the main map two times, once to bring up the My Location drawer and second time to get toggle the heading line.
You can also set the Auto Recenter, which will automatically recenter your position when you are on a voyage or track and not centered for more than 10 seconds.