Horizontal Annotations are available for GraphWidgets in CDK. But we don't have Vertical Annotations available in CDK

https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-cloudwatch.HorizontalAnnotation.html

Use Case

We normally plot Vertical lines i.e particular timestamps of deployments/Events in the Graphs during troubleshooting any particular issue.

Let say we want to check if Latency/Error counts increased after particular deployment or timestamp.

We have that same feature in Cloudwatch Console. We can create it manually.
But CDK doesn't have that same feature.

Proposed Solution

Add one more property for Graph Widget like Horizontal Annotation

https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-cloudwatch.HorizontalAnnotation.html