The Subscription plugin allows you to add subscription groups. Options in the bottom menu are:
Add - this option allows you to add a new subscription.
Edit - by pressing this button you will be able to edit the subscription name.
Disable - this option will disable or enable the selected subscription.
Settings - this option allows you to change e-mail addresses, e-mail name and pages after subscription.
Import
Delete - this option deletes the selected subscription.
Next - this button will take you to further options and settings of the selected subscription.
Cancel - you will go back to the plugins list.