Re-center navigation map after zooming or moving

If you change the navigation map by zooming in or out (pinch) or move the map away from the current location (the arrow), how do you get back to the current location? It took me a few minutes to realize the trick to this....

When the map is centered, there is an arrow shown:

If you move the map by swiping with your finger or change the zoom by pinching, the current location arrow may disappear. When this happens the North circle and arrow are "grayed out":

Once you are finished looking at another part of the map and want to get back to the current location:

1. Move your hand close to the screen (assuming you enabled "hand gestures" in the setup)
2. The map location button will appear
3. Touch the map location button to re-center the map on the current location

Now the map is centered on the current location and the arrow is shown: