The upper window is the 3D volume pane. The volume pane can display slice planes of the axial, sagittal and coronal planes oriented relative to each other in 3-space, maximum intensity projections, and a view a full 3D volume rendering of the data. The volume pane is manipulated using the mouse. Please see the SCIRun Userguide for more information on navigating inside of the volume pane's Viewer Window. Section 6.3 of the SCIRun Userguide: "Mouse Control in the Viewer Window".