Hiding Addresses in iCloud Group Emails

I have restored all the addresses in a large group that I send periodic emails to. In the old days, I just typed the name of the group, but I was able to hide all the addresses. That way, no one had to see the whole aggravating page of names and addresses. They just saw the group name. And some of the people did not want their address to be public, anyway. I CANNOT find anything in iCloud email preferences that allows me to do this. When I type the name of the group, every one of the names appear! How can I send an iCloud group email without a page of addresses showing