kendo spreadsheet

I am using kendo spreadsheet and all my data is returning json values.
Question can i format the grid as far as rename headers or position my data where I want to. Not much info on how when it is dynamically coming from the server.

  $("#spreadsheet").kendoSpreadsheet({
      //          columns: 50,
      //          rows: 100,
      //          toolbar: true,
      //          sheetsbar: true,
      //          sheets: [{
      //              name: "Summary",
      //                    mergedCells: [
      //         // "A1:D1"  // Sheet Cell Placement , "C4:G4", "O4:R4", "A13:B13", "A16:B16"
      //                    ],
      //             rows: [{
      //          height: 30,
      //          cells: [{
      //            value: "label", background: "rgb(144,164,174)", textAlign: "center",
      //                      color: "white", fontSize: 18
      //          },
      //          ],
      //      }, 
      //      {
      //               index: 3,
      //               cells: [
      //                  {   index: 2, value: "Mean Total Returns(net)", fontSize: 15, textAlign: "center"}
      //                ],
                  
      //          },
      //        {
      //               index: 3,
      //               cells: [
      //                  {   index: 14, value: "Mean Asset Allocation", fontSize: 15, textAlign: "center"}
      //                ],
                  
      //        }],
                 
      //            dataSource:  dataSource, 
      //              columns: [
      //                  { width: 100 },
      //                  { width: 415 },
      //                  { width: 145 },
      //                  { width: 145 },
      //                  { width: 145 }
      //              ],
               
      //          }]
      //      });
           

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