Self

Rotation is also possible about the current viewpoint position. This has the effect of the viewer standing on the spot and looking all around. When the Self button is switched on, the center of rotation is the current position when flying in rotation mode. This button is sticky, to use the picked rotation points select the Self button again.

It is good practice to select a suitable center of rotation close to the area of interest. All 3D flight is then based around that new origin. If this is not done, the flight control will be based on the global origin, which may prove difficult.