Quick question. Is there any kind of camera control within the preview window other than just left clicking and rotating the camera around wildly? I know you can zoom in with the mouse wheel but that doesn't always help.
Hold Shift and move the mouse to rotate. If you click on an object and then hold shift + move mouse, you'll rotate around that object. The arrow keys will move you around too. Middle mouse will pan.
Right click in the void and select Render Window Properties, under movement - you can adjust Zoom, rotate, and pan speeds.