Does not work. Ctrl + N creates a new book, not a new window of the same book.
Normally I would choose -View, -New Window, then I get the same workbook open in two tabs, but in the same window.
I want to see the same workbook in two different windows, in my case, each on a separate monitor.
This is easily done in Excel, without office-tab installed.
I guess I can disable office-tab temporarily, then re-enable it. Seems like that option should be avoidable