I have created a new field "title" (why isn't there a default for this) and it shows for one, but the next contact, it does not show as a selection. If I create it again, it says it exists, but it is not shown as a selection choice.
Thank you for reaching out to the Community! When you create that custom field you may edit each contact and add in a title for them. Please take a look at our great article for adding your custom field to an email campaign so it appears for each individual contact when sent.