## Viewing the volume

After a volume has been loaded, it is displayed in the OpenGL Widget in the center of the main window.

### Projection

The volume can be viewed with an orthogonal and an perspective camera. The type of viewing can be selected with View > Perspective or View > Orthographic.

### Scene transformation

The following mouse interactions are possible.

left mouse
  Rotates the volume along two rotation axes.
mid mouse
  Translates the volume in x and y direction like the mouse is moved.
right mouse
  Zooms the camera. Moving the mouse up zooms out and moving the mouse down zooms in.

To reset all these transformations select View > Reset transformations.