BUILT-IN WOLFRAM LANGUAGE SYMBOL
is a symbol that can appear at a particular position in a Grid or related construct to indicate that the corresponding position is occupied by a spanning element that appears above it.
- If SpanFromAbove appears at the same position in several successive rows, it indicates spanning across all these rows.
Make the element 2 span the row below it:
Make it span two rows:
Spanning in a GraphicsGrid: