Click in the margin to the left of the row above which you want to insert another row; the row becomes highlighted, and the mouse pointer rotates to point up and to the right.
Right-click the row and select Insert Rows; the new row appears above it (to delete the row, select Delete Rows).
Click above the column you want to delete; the column becomes highlighted. (Notice that the mouse pointer rotates to point downward.)
Right-click the column and select Delete Columns to delete the column (to insert a column to the left, select Insert Column).
INTRODUCTION
When working with Word tables, you might find that you need another row or column after you have already created a table. Word lets you easily insert and delete rows and columns while working in a table.
TIP
Deleting Text Only
Selecting a row and then pressing the Delete key removes the text within the cells, leaving the row empty but intact.
TIP
Adding a Row at the End
To add a row to the bottom of the table, place the cursor at the end of any text in the bottom-right cell in the table and press the Tab key.