Answer:
To add a row into his spreadsheet he needs to click in the row line where he wants to add a row line below, press the right-click and look into the pointer menu the option" add" to click it and add a row line.
Step-by-step explanation:
First of all, he needs to differentiate the rows from the columns. The rows are the rectangle line organization at the left edge of the screen. They are numbered. The columns are the rectangle line organization between the spreadsheet and the toolbox. They are organized by the letters of the alphabet. Now, to add a row he has to displace the pointer to the row where he wants to add another row line below. Then press the right click on it and look into the menu or the "Add" option to add a row line.