Describes the cause and action for error messages.
Error Message(English)：
delete everything not selected
windows 7 - Is there a way to delete everything except what is ...
https://superuser.com/questions/521843/is-there-a-way-to-delete-everything-except-what-is-selected-i・・・
Deleting multiple selected rows in Excel
https://superuser.com/questions/506006/deleting-multiple-selected-rows-in-excel
Excel: Delete row if cell in certain column is blank?
https://superuser.com/questions/474530/excel-delete-row-if-cell-in-certain-column-is-blank
microsoft excel - How to delete rows not in filter
https://superuser.com/questions/387484/how-to-delete-rows-not-in-filter
Reset an Excel Spreadsheet - Delete your data but not your formulas ...
https://www.iqaccountingsolutions.com/blog/reset-excel-spreadsheet/
Hide everything but the working area in an Excel worksheet ...
https://www.techrepublic.com/blog/microsoft-office/hide-everything-but-the-working-area-in-an-excel-・・・
How to delete blank or unneeded rows in your worksheet, Method 1
http://www.exceluser.com/blog/156/how-to-delete-blank-or-unneeded-rows-in-your-worksheet-method-1.ht・・・
Clear cells of contents or formats - Excel - Office Support - Office 365
https://support.office.com/en-gb/article/clear-cells-of-contents-or-formats-9ff6b8ff-1afd-495f-8ad8-・・・
How to delete rows in Excel using shortcuts or VBA macro - Ablebits.com
https://www.ablebits.com/office-addins-blog/2014/08/21/excel-delete-row-shortcut/