name : modify-availability-zone-group.rst **To enable a zone group** The following ``modify-availability-zone-group`` example enables the specified zone group. :: aws ec2 modify-availability-zone-group \ --group-name us-west-2-lax-1 \ --opt-in-status opted-in Output:: { "Return": true } For more information, see `Regions and Zones <https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html>`__ in the *Amazon EC2 User Guide*.