Do manipulate the border, press 'B' to toggle on/off ortho slices borders and press 'C' to toggle ortho slices color. Change ortho slices position by dragging the mouse in selection mode (Arrow).
SoVolumeData, SoDataRange, SoOrthoSlice
SoOrthoSlice rendered with a specific color for each body plane.
SoOrthoSlice without border.
Color changed for all SoOrthoSlice.