I don't think the decorative portions of scale-shapes in the Tratado de Astrologia are any different from the decorative scale-shapes in the Vulgate Bible or music books. They are drawn in the same way, around the edges. They use the same elements, scaly shapes with dots and little lines or points coming out of the ends.
It's the part in the center, within the decorative borders, that has the astrological content.
It's the part in the center, within the decorative borders, that has the astrological content.