Backup diff of PDF/1.7 (No. 1)

• Backup list
• View the diff current.
• View the diff for visual.
• View the source.
• View the backup.
• Go to PDF/1.7.
  • 1 (2017-08-30 (Wed) 10:22:59)

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

- https://www.iso.org/standard/51502.html