Low-level box construct for grid/table display.
GridBox[{{box11, box12, …}, {box21, box22, …}, …}]
- AllowedDimensions — default Automatic
- BaselinePosition — default Automatic
- BaseStyle — default { }
- ColumnAlignments — default Center
- ColumnLines — default False
- ColumnsEqual — default False
- ColumnSpacings — default 0.8
- ColumnWidths — default All
- GridDefaultElement — default \ [ Placeholder ]
- RowAlignments — default Baseline
- RowLines — default False
- RowMinHeight — default 1.0
- RowsEqual — default False
- RowSpacings — default 1.0