Describes the cause and action for error messages.
Error Message(English)：
cannot view side by side
microsoft excel - Single-Window Mode for ...
https://superuser.com/questions/1045881/single-window-mode-for-multiple-worksheets
microsoft office - Need two excel windows side ...
https://superuser.com/questions/841699/need-two-excel-windows-side-by-side-on-different-monitors
2 Monitors 2 Excel Sheets?
https://superuser.com/questions/676409/2-monitors-2-excel-sheets
Need two excel windows side by side, on different ...
https://superuser.com/questions/273977/need-two-excel-windows-side-by-side-on-different-monitors-in-・・・
Cannot View Excel (xlsx) Side by Side - Super User
https://superuser.com/questions/651030/cannot-view-excel-xlsx-side-by-side/651032
View two or more worksheets at the same time - Excel - Office Support
https://support.office.com/en-ie/article/view-two-or-more-worksheets-at-the-same-time-1deed3da-a297-・・・
How can I view two different Excel sheets side by side? - LibAnswers
http://libanswers.walsh.edu/faq/147936
Get Multiple Excel Windows - YouTube
https://www.youtube.com/watch?v=-DeCPJVB7jY
https://www.youtube.com/watch?v=-DeCPJVB7jY