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 to its left.
- If SpanFromLeft appears at several successive positions in a row, it indicates spanning across all these positions.
Make the element 4 span the column to its right:
Make it span two columns:
Span across the remaining width of the grid:
Spanning in a GraphicsGrid: