While typing a message to person "A", it would be nice to add another recipient. (Even the stock messaging app allows this). And this option exists with textra when starting a new message but doesn't exist when selecting the person from your messages list. I don't know why it can't be available both places. Example: If i'm texting a buddy and want to invite him and his wife to dinner, I can't simply add his wife, unless I back out and use the pencil option (starting all over). Please fix