You can change the content of the email template in the email service, which you will create in the App42 panel.
Please follow the steps to change the content of the email template:
AppHQ->App42CloudAPI->UnifiedNotifications->Email->Template->Manage(already created template)->Update, where you can be able to change the content of the template.
In case if you have any other queries please do feel free to reach out to us.
We will be happy to help you.