Reply Subject Modification setting to disable

I see subject modification settings are configurable in Settings-Mail-Replies&Forwards-SubjectModifications.

However, there appears to not be a setting to disable subject modification entirely. When I reply or forward, I want to retain the original email subject. Is there a setting that I am missing?

Thanks in advance for your help.

Hello Rod,

This is unfortunately not available since the standardized format is kept due to the compatibility between different email clients.

Russel