Changing Field of View with Console Command

There is a slider in the lower right corner of the main GUI window that allows you to change the displayed field of view from 10 degrees to 180 degrees (fisheye) mode. However if I am in full screen mode (F11) and am using the Input Tool, this slider disappears. Rather than toggle between the full screen and normal modes to access the slider (which is very inelegant during the middle of a presentation), is there a custom console command that can be used to change the field of view?