The technique for creating and modifying group lists for emailing has become a bit less intuitive with the new format in Contacts. Here’s a decent primer.
[their header] If you send emails to the same group of people regularly, you can cut down on wasted time by creating an email list to use in Gmail. While it’s not inherently obvious, here’s how to generate a mailing list.
— Read on www.howtogeek.com/464478/how-to-create-an-email-list-for-gmail-to-send-group-emails/