Hell @montezh2001,
I think you won't be able to change that setting. you can try to mass update selected lines and change it but might not be taken in to consideration.
You can stop it and create new one where you remove those who already got the email and set your waves as needed
or
You can maybe manually pause it and upause to kind of manually create waves
Marcel Szimonisz
MarTech Consultant
for more tips visit my blog
https://www.martechnotes.com/