With HERE Maps, it's possible to show north at the top of the screen or for the map to orientate itself according to the way you're facing. HERE Maps defaults to showing north at the top of the screen. To change it to show the way you're facing instead, tap the My location icon (the green circle) in the bottom-left corner of HERE Maps. A compass will appear in the top left of your screen to show you where north is. If prompted to set the compass, rotate your phone as instructed.
To make north the top of the screen again, tap the My location icon again or tap the compass icon.