MDI in Excel 2000

MDI (Multi Document Interface)
In Excel: can MDI be turned on and off?
If so, How?

Otherwise does anybody know how to reactivate it?

A co-worker opens several spreadsheet and each of them show it's own button in the task bar.

On mine it only shows one. I can simply go to Excel menu bar , Window and select which sheet I want to view.

She can do this too but the items in the taskbar are taking too much real estate there.

Tools --> Options --> View Windows in Taskbar

Thank you.
I am at home at the moment with Excel 97 and that option is not found.
When I get to work I will check my co-workers machine for it.
Thanks again.

Worked like a charm.
I am surprised that I missed the setting yesterday.
Thanks