How do I change the list of emails that pop up during autofill?

Hi steph_giles ! Thanks for getting back to me.

Those specific ones always come up, but I want a specific one to be listed rather than have 1Password decide for me.
Emails in the first and second line come from one Identity and the third one from another, though it's not what is what I prefer as they aren't necessarily the ones I always use. Having anything suggested in an email field is useful, but not in this case unfortunately.

What happens if I decide to delete all emails? Does nothing show up? Is that the only solution here?