To display the table borders you may have to click on the Toggle Table Borders icon ti display the tables.
Most Common Usage of the SPAW Tables
Example:- You have a table and want to insert another row below A Grade Runner Up
In the Graphical Editor mode you place the cursor on the row where you want to insert a row below You then click on the Insert Row Icon - which will insert a row below from where the cursor is positioned. (note you will have to click the toggle borders to show the table outline)