Define by Settings or via API Calls custom context Menu for any Cell, like change current by Event BeforeContextMenu(ref ContextMenuElement)
Currently, after export to excel and opening the exported file again in Spreadsheet, the row heights for rows with predefined height change. The above could be easily observed on the Index demo:
* initially, the height of the top row is set to 70px;
* export the Spreadsheet to Excel;
* after re-importing the above file, the height of the first row "Invoice #52" becomes 81px without any apparent reason.