Describes the cause and action for error messages.
Error Message(English)：
not viewing side by side
window - Excel 2013 side-by-side sheet view
https://superuser.com/questions/1363302/excel-2013-side-by-side-sheet-view
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-・・・
Can't view Excel (xlsx) side by side - Super User
https://superuser.com/a/1309748
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
MS Excel - View Files Side by Side - YouTube
https://www.youtube.com/watch?v=fjSodXZd0TA
https://www.youtube.com/watch?v=fjSodXZd0TA