I believe I have the latest (last/most current) verision of Office and Excel. I have started using it and it seems I have clicked somewhere by mistake and activated the feature where the excel spreadsheet is in split screen representation. I have tried a few clicks in the UI where I would assume I could get out of the split screen feature but nothing intuitive worked. I have also tried closing and open the Excel file but it returns to the last most recent format. Please help.