Everyday I use excel with several workbooks open. Below on the taskbar
I can see the excel icons for workbook 1 2 3 and so forth.

Today I started work and opened excel. Opened my workbooks and now I
have no open workbook icons in the taskbar. Nothing is windows hidden
and I did nothing before leaving yesterday to change excel.

I'm now working with three excel programs running to switch between
workbooks. How can I correct the behavior as I need one excel open with
workbook icons listed for perusal.

Thanks
Joe F