I was looking at an Excel sheet and click some combo of keys to open a new Excel sheet. When I closed the new one, my old sheet did not show up. I have tried expanding/collapsing between full screen and and changing the width/height, but it doesn't show. I have also tried opening and closing the doc and the sheet still does not show. My colleague can open it and view it just fine (the doc is on a fileshare), so I don't know what's going on. Any suggestions of where it went?