Click on the Search Contacts link on the home screen.
On the Search For Contacts screen, you have a few different options in the search criteria boxes. One of the easiest ways to find a contact is by their email address. Using this method, I am going to search for a contact with the email address 'firstname.lastname@example.org' by using the below criteria in the drop-down boxes.
Email Address \ is \ email@example.com
Now click the 'Display Results' box. This will bring up any instances of a contact with the email address 'firstname.lastname@example.org'
To the far right, underneath the Action column, you will see three different links you can click on "View Edit Delete" - choose the appropriate link for your desired action.
Note: If you edit your contact, make sure you click the "Save And Exit" button, so the information is saved.