The New Domain wizard allows you to quickly define a new domain with some basic properties that you can modify later.
Double-click the New Domain icon to start the wizard.

Type the Name of the new domain, a fill in the Description field and press Next.

Select the Domain Type from the drop-down list.

Specify a Domain value, dependant on the Domain type (see the Domains Domain section), and press Next.

Enter an Email address of the domain administrator and press Next.

Check your settings and press Next.

Check the screen for any error messages. If the above screen is shown, then your domain has been created successfully!