In the new Control view, you can create alerts and action plans for entities across the cloud.
Alerts can act on alarms from across the platform. This means you can create alerts that combine any alarms for any metrics on any VMs, any scaling groups, and any custom metric entities throughout the platform.
Action plans can perform general actions, and actions on VMs and scaling groups across the cloud.
When you create the action plan, just select the actions and entities on which to perform the actions.
Then create the triggers to run the action plans. Triggers can be schedules, or alerts with alarms from across the platform.