Deleting rows
To delete a row in grid view, select the row by clicking the button at the left of the row, then press Ctrl+U. In columnar view, navigate to the row and press Ctrl+U.
You can also delete rows through the Delete Rows dialog box:
Find the row in the columnar view or select the row in the grid view.
Choose Table|Delete Rows, or click the Delete button in the toolbar. The Delete Rows dialog box appears.
Click OK to delete the currently selected row, or specify a particular row number, or choose all to delete all rows. Click OK.