Begin by determining whether if this is the primary email address for the constituent. If it is the primary email address, and you would like to save this old email as an additional email, you can copy the old email address and click +New in the Emails area. If you simply need to update the email address, you can type in the new information and click Save to save the changes.

To edit an additional email address, proceed to the Emails area and click on the Pencil (edit) icon to edit the information in a pop up window. Click Save to save the changes. 

To delete an additional email address, click on the Trash Can icon. Confirm the change by clicking the Delete button in the warning window.