when choosing stdmulti.widget[123]`s property "Crosshair.Orientation Decoration" (aliased to "decoration") to paint an arrow of direction, the rendered arrow points in the wrong direction for coronal (blue) and axial (red) plane, while it is rendered correctly for sagittal (green) plane.
As of 2016-08-03 it is unclear to me which way it should be painted:
ascending index coordinates,
ascending world coordinates,
descending *,
mouse-wheely,
some other direction for some fine reason.
Needs disscusion or guidance.