Excel: Unhide a column in Excel 2003/XP/2000/97
Also learn how to unhide a column in Excel 2007.
Question: How do I unhide a column that has been hidden in Excel 2003/XP/2000/97?
Answer: Select the column to the right and the column to the left of the hidden column. In this example, column B is hidden.

Right-click and select "Unhide" from the popup menu.

Now, column B should no longer be hidden.

To learn how to hide a column, click here.