AWS::CloudFormation::Interface

This helps how to modify the ordering and presentation of parameters in the AWS CloudFormation console.

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By default, parameters display in an alphabetical order by their logical IDs

The AWS::CloudFormation::Interface metadata key uses two child keys,

1. ParameterGroups (you could group all EC2-related parameters in one group and all DB-related parameters in another group)

• Each entry in ParameterGroups is defined as an object with a Label key and Parameters key

2. ParameterLabels (A label is a friendly name or description that the console displays instead of a parameter’s logical ID.)

The ParameterLabels key takes a list of parameter logical IDs, each of which has a friendly description as a subkey.

This is how define in your template

• Create two Parameter groups one for database configuration and one for EC2 configuration
• For Key Pair we are using label that will shown in the console
• Clone this repo and create a stack

Metadata: 
  AWS::CloudFormation::Interface: 
    ParameterGroups: 
      - 
        Label: 
          default: "DB Configuration"
        Parameters: 
          - DBPort
          - DBPwd
      - 
        Label: 
          default: "Amazon EC2 Configuration"
        Parameters: 
          - InstanceTypeParameter1
          - myKeyPair
    ParameterLabels: 
      myKeyPair: 
        default: "Use the Key Pair"
Parameters:
  InstanceTypeParameter1:
    Type: String
    Default: t2.micro
    AllowedValues:
      - t2.micro
      - m1.small
      - m1.large
    Description: Enter t2.micro, m1.small, or m1.large. Default is t2.micro.
  DBPort: 
    Default: 3306
    Description: TCP/IP port for the database
    Type: Number
    MinValue: 1150
    MaxValue: 65535
  DBPwd: 
    NoEcho: true
    Description: The database admin account password
    Type: String
    MinLength: 1
    MaxLength: 41
  myKeyPair: 
    Description: Amazon EC2 Key Pair
    Type: "AWS::EC2::KeyPair::KeyName"
Resources:
 Ec2Instance:
  Type: AWS::EC2::Instance
  Properties:
    InstanceType:
      Ref: InstanceTypeParameter1
    ImageId: ami-01aab85a5e4a5a0fe