You can use the Insert commands in the Table Layout tab to manage the rows and columns in tables.
Add a row or column
You can add a row above or below the cursor position.
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Select where you want in your table to add a row or column and then choose the Table Layout tab.
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To add rows, selectÂ
 Insert Above or  Insert Below and to add columns, choose  Insert Left or ​​​​​​​ ​​​​​​​Insert Right.Tip: To add a row at the end of a table, select the last cell of the last row, and then press the Tab key.
Delete a row, cell, or table
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Select a row or cell in the table, and then choose the Table Layout tab.
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SelectÂ
 ​​​​​​​Delete, and then choose the option your need in the menu.