I have googled a lot and didn't find the answer.
I think in older Blender versions, if you for example middle mouse click on a model and drag, it rotates around the point you hovered your mouse cursor over, for example the surface of the model.
But since I updated to Blender 2.8 it always rotates around a fixed point somewhere in the distance, so I have to use the walk navigation to rotate around the model. For example I wanna rotate around the model but it rotates around a point far behind the model