<ReactDataGrid /> cells can be configured to span over multiple rows or columns - via the column.rowspan() and column.colspan() functions, which should return numeric values - the number of columns/rows for the current cell to span over. .column.rowspan({ data, value, rowIndex, column, dataSourceArray }) and column.colspan({ data, value, rowIndex, column, dataSourceArray }) column-level prop functions - in those functions you have access to all the info you need to perform dynamic row/col spanningcolumn.rowspan and column.colspan functions you have access to the data you need to make those truly dynamic.column.rowspan &column.colspan functions should return a numeric value - the number of columns/rows the current cell should span over.