I have a random display problem on some slddrw files. The edges of 3D elements are not black. By playing with parameters such as realview graphics, switching to shaded image display style and returning to edges in shaded image mode, the edges reappear in black. But this is not always the solution. In addition to the drawing, which is not very clear without the edges, this also impacts the printing, which is done in black and white.
Another question: why in the stopped display style in shaded image mode, when I switch to high quality, the drawing changes to black and white?