To check the return to the starting point with the Garmin Instinct 2 Solar, follow these steps: 1. Turn on navigation: From the watch face, go to the GPS menu and select Navigation, then "Return to starting point". 2. Set starting point: If you do not have a saved starting point, you must register it. Press "GPS" to save the current point. 3. Start navigation: Choose "Start Navigation". The watch will guide you along the reverse route.