If you wish to let the application "follow" you and pan to your location at each GPS signal, click the circle button in the bottom-right corner:
You can also go to the "My position" menu > Follow my position. To disable this behaviour, select "Follow my position" once again.
The circle button will turn into a "lock" icon, meaning that Maps Pro will stay centered on your position, even if you move:
To stop Maps Pro from following you, just move the map.
If you click once again on the button, it will turn into a "rotate" icon, meaning that Maps Pro will be following both your position and your bearing: