Then you will need to open an instance for each. (From the Start menu,
or the Quick Launch toolbar)

Tim S wrote:

How can I have an Excel 2007 file with 2 sheets, Data and Chart, so that each
sheet opens in a separate window? It USED to work like that, with the older
version I had. I want to be able to switch between the windows with alt-tab.

Any ideas?

Thanks,

Tim