Backup diff of Grayscale (No. 1)

• Backup list
• View the diff current.
• View the diff for visual.
• View the source.
• View the backup.
• Go to Grayscale.
  • 1 (2018-10-16 (Tue) 16:48:03)
  • 2 (2019-07-04 (Thu) 17:08:19)
  • 3 (2019-09-22 (Sun) 20:28:41)
  • 4 (2020-04-15 (Wed) 23:19:50)
  • 5 (2021-10-29 (Fri) 18:55:14)
  • 6 (2022-12-07 (Wed) 16:04:22)

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.

* Illustrator [#y815abb8]

- Illustrator カラーをグレースケールに一括変換する方法
--  https://www.nishioka.co.jp/note/illustrator-grayscale