Excel: Unhide a sheet in Excel 2003/XP/2000/97
Also learn how to unhide a sheet in Excel 2007.
Question: In Excel 2003/XP/2000/97, how do I unhide a sheet that has been hidden?
Answer: In this example, we want to unhide Sheet1.
Under the Format menu, select Sheet > Unhide.

When the Unhide window appears, select the sheet that you wish to unhide. Click on the OK button.

Now when you return to your spreadsheet, Sheet1 should be visible.

