1) Click on the account drop down button in your account's main navigation.
2) Click on the Integrations option.
3) Find Campaign Monitor within the Integration options and click the Install button.
5) Enter the Client ID of the client you would like to install.
6) Click the Save Credentials button.
7) Campaign Monitor is now available for you to use on your payment forms. Learn how to add your payers to a Campaign Monitor subscriber list when they check out on one of your payment forms.