Article ID: 2749173 - View products that this article applies to.
Assume that you open multiple workbooks at the same time in Microsoft Office Excel 2007 on a computer that is running Windows 7. Then, you point to the Excel taskbar button. However, the taskbar thumbnail preview feature in Windows 7 displays Excel icons over a gray background instead of previews of the workbooks.
To work around this issue, enable the Show all windows in the taskbar option in Office Excel 2007. To do this, follow these steps:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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