Hello Abhijit,

To merge the cells across rows in the grid you need to set MergedCellStyle of the corresponding column to Always. Note, that you can even create your own logic for merging cells by implementing IMergedCellEvaluator Interface as shown here.

Rotating the cell text is not possible in the grid. However, by implementing custom DrawFilter you can achieve this.

Attached is a small sample showing how you can merge cells and rotate the cell text. Keep in mind that cells are merged and the text is rotated as long as the cell is not in edit mode. When the cell enters edit mode the cell editor gets painted and merging ends.

Please let me know if you have any additional questions.