The steps to create change sets are as follows:
- In the CloudFormation console, select your stack.

CloudFormation Stack
- Select Actions | Create Change Set For Current Stack.

Modify Stack
- Select Upload a template to Amazon S3, upload the updated template from https://github.com/PacktPublishing/AWS-Networking-Cookbook and click Next.

Upload the modified template
- On the Specify Details page, current stack values will be ...