This dialog lists all the lattices that are compatible
with the current settings in the entries
System,
Lattice and
Group. When the settings are
impossible, no lattices are shown. When the entries
are empty, all 5 lattices are shown.
For each possible lattice, GAMGI lists its usual upper-case
symbol, the description, the systems where it occurs and the
number of groups with this centering.
Clicking on a listed option in the lattice dialog, has
exactly the same effect as writing it directly on the
Lattice entry.