Backup source of Filter/Window (No. 1)

• Backup list
• View the diff.
• View the diff current.
• View the diff for visual.
• View the backup.
• Go to Filter/Window.
  • 1 (2023-08-15 (Tue) 15:03:00)

- 窓関数を用いる理由
--  https://www.logical-arts.jp/archives/124