Select the My Lists option from the Lists Menu. This will display all of your current lists.
Click on the list title in which you want to edit a subscriber. This will display a list of all the subscribers currently associated with that list.
Click on any contact or the View icon right next to the contact to edit the subscriber's information.
The Subscriber Details Window displays information about the subscribers as well as any notes and activity history (i.e., when the user subscribed to the list, campaigns that have been sent to the user, etc.).
To edit the subscriber, click on the Edit Link. This will enable you to change the subscriber details.
For each subscriber, you can edit the information in the fields that have been defined for that list. Some of those fields might include:
Email address (required),
When you have finished making changes, click the Save button to commit the edits to the database.