For most cases (the simple structures) the pictures of the magnetic unit
cell will be generated in an automated way by the presentation program.
The user will be able to choose one of four views available: three along
the axis of the coordinate system and one standard perspective view. In
the special cases of complicated structures (spirals, modulated structures)
one schematic view in the form of a bitmap file loaded into the respective
window will be only available. The spins will be presented as arrows of
equal lenght to make the spin direction more legible.