Dewarping A Fisheye

At first when you select dewarp mode, nothing really happens. But now you can zoom in and out with the mouse wheel and hold left click to pan around in the direction of the arrow cursor. The more you zoom in, the more it can dewarp. After zooming in and panning to the view I need, it can look like the following image.

When you select panorama, the camera feed will appear like the following image. You can also scroll in and out and pan around, but not in the same way as when you dewarp a camera.

When you select dual view, the camera feed will appear like the following image. You can also scroll in and out and pan around, but not in the same way as when you dewarp a camera.