1.Select the number of columns you want to insert. For example, if you want to insert two columns into your table, select two existing columns. You can select entire columns, a cell or cell ranges.
2.Insert the columns in one of the following ways:
•In the Command menu, click Format point to Table and click Insert Column to the Left / Insert Column to the Right.
•On the Toolbar, select the Table section, click Insert Column to the Left or Insert Column to the Right.
•Right-click on any place in the selected range and click / on the shortcut menu.
•Press Option+L to insert column to the left or Option+R to insert column to the right.