Mandala App has a two-layer structure that composes a 9x9 (B-type) chart
from a 3x3 (A-type) chart. Each of the 8 squares around the top will expand
to 8 more squares. To expand, tap the alphabet of the cell you want to
expand, and the lower layers of that cell will be expanded.

Tap the alphabet icon in the center cell of the lower layer to return to
the upper layer.
