Amazon ECS Management Console now supports custom capacity provider strategy with run task
Amazon Elastic Container Service (ECS) Management Console now supports specifying a custom capacity provider strategy when you run tasks manually using the Run Task functionality. This capability has been available through the AWS CLI, SDK, and API, but is now available through the Management Console as well. For use with manually running tasks, a custom capacity provider strategy consists of one or more capacity providers with an optional base and weight specified for each provider, giving you control over how your tasks are distributed across one or more capacity providers.
Source:: Amazon AWS