1. The Rotation mode in the left tool bar is selected.

1. Click for the spin mode.
2. Move the mouse inside the image area.
3. Hold down the left mouse button and move the mouse slightly to the left or right.
4. Release the left mouse button again.

1. The 3D volume rotates continuously in the direction in which you moved the mouse. If you move the mouse quickly, the 3D volume rotates quickly. If you move the mouse slowly, the 3D volume rotates slowly.
2. To stop the animation, left-click again in the image area.