Very often the pull down on the upper left hand corner of the Preview window that has the figure's name on the left (i.e. James), and Body/ Body Parts etc. as choices on the right, for some reason, on its own switches the right pull down to Ground and then when I try to Orbit the camera around my figure I instead move the floor. Can anyone tell me why it's switching to Ground and if there's anything I can do to stop it?

Am I inadvertently hitting some key that switches it?

Thank you.