In RFEM6.12.0007 (and older versions) the scaling slider for the supports (nodal, line, surface, stability nodal supports, design supports, etc.) does not make their geometries small enough so that they don't obscure the structure itself. This is the case for both the main 3D view, and the smaller 3D views in pop-up windows. In the 3D views of the pop-up windows, there is not even a slider available.
It would be nice to have a better functionality for the slider, and have the slider option in the 3D view of the pop-up windows as well.