To edit the name or email address of someone in a contact list you will want to navigate to the specific contact lists and person in the "Lists" section.

From here, you will want to hover over the respective contact and click the edit icon to the right as shown below:

After you click the edit icon you will be able to change the first name, last name, and email address of the person as shown below. After you make the necessary changes, click the green check mark and the information will be updated. 

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