If you are referring to the taskbar windows, go to the Windows button within
Excel (top left), then go to Excel Options - bottom right of popup. In View
tab, check Windows in Taskbar.

If you mean you want to view 2 spreadsheets at the same time, go to View,
then Arrange All.

"rojomoke" wrote:

The default behavior when I open two spreadsheets simultaneously is to stack
them in the same window, so that only one can be seen at once. How can I get
it to put them into different windows, so that I can see them side-by-side?