Stop Excel from Opening in Full Screen Mode (Office 365)

[Gborden800]

I have Office 365. Whenever I start Excel or open a new file with Excel, it opens (or goes to) full screen mode. I can find no way to stop this from happening. Any ideas?

 

[Drrellik]

open excel, minimize or reduce the workbook to the size you want i.e half screen or other and close. excel remembers then reopen

 

[Gborden800]

That was the first thing I tried, and it didn't work. This is much more persistent as though there is some global setting that is forcing it to full screen mode when first opening a spreadsheet, or when transferring focus back to an open spreadsheet.