Microsoft Word provides a feature through which you can add or delete columns in an existing table.
Adding a new column in an exiting table is very simple. Use the following steps to add a new column.
Suppose you have a table in a Word Document that contains 4 rows and 4 columns. And you want to add another column.
Click a column where you want to add an additional column.. Here I clicked in column3.
Click the Layout tab and go to the Row & Column Group of buttons to add any column left or right to the selected column. Here I have selected insert left.
Note: You can also select the Insert Right option to add a column to the right of the selected column.
Delete a Column
You can also delete a column from an existing table. Do the following steps to delete a column.
Click the column you want to delete from the table. Here I clicked in column3.
Click the Layout tab and go to the Delete Column option buttons under the Delete Table Button.
Note: See, colum3 has been deleted.