To delete and add columns and rows:
•Use the commands from the Table command menu.
•Use the buttons on the Toolbar.
•Use the commands to insert and delete columns and rows available in the context menu (the set of commands in the context menu depends on the location of the cursor inside the table and on the selected cells).
•Press Alt+Ctrl+R ( Option+ Cmd+R) to delete a row and Alt+Ctrl+U ( Option+ Cmd+U) to delete a column.