If you are using a touch-enabled device, you can control the camera as follows:

Drag 2 fingers: zoom.

Drag 3 fingers: orbit.

Drag 4 fingers: pan.

You can also use common controls with mouse and keyboards as follows:

Alt + RMB: pan.

Alt + LMB: orbit.

Alt + MMB: zoom.

Mouse wheel: zoom.

Finally, you can snap the camera to predefined orientation with 45° steps:

Alt + left arrow: snap left

Alt + right arrow: snap right

Alt + up arrow: snap up

Alt + down arrow: snap down