Got it! Doing what you had just posted has definitely changed my all-domains-use-it php.ini file as desired and right where it is. And now, and since I do still have a bit of red showing, certain other changes must need to be done via manual edits, yes?
Definitely looking forward to tomorrow…and part of that will be trying to begin addressing the matter of why certain *other* plugins are building my error log as they are…
Many thanks.