The train represents the second hand. The arrowhead at the outer edge is the watch battery power indicator. 3 oclock position is 25 percent battery, 6 oclock is 50 percent, 9 oclock is 75 percent etc. Tap actions for messages and timer apps are at the 3 and 9 oclock positions respectively. Tap actions were tested on a Samsung Galaxy watch and may not work on other smartwatches. If the tap actions do not work for your watch or you prefer the shortcuts to link to other apps, you can customize them in Watchmaker app to suit your preferences.