Caution: When you try to delete thousands of rows, an alert might appear if your computer has insufficient memory to save data for undo. Either select fewer rows to delete or select Disable Undo from the Table panel red triangle menu. This option removes all actions from the undo history and does not record future actions. When the Disable Undo option is selected, it is in effect only while the data table is open; the setting is not saved with the data table.