There are a couple of ways you can edit a contact's profile.
The first option is to edit the contact by going to the Contact's Page.
Search for the contact in the top right corner.
Then click the "edit" icon next to the contact you wish to edit.
You will be able to edit all the contact's information in this screen. Make sure and click save.
The second option is to edit the contact from the inbox.
In the inbox search bar, search for the contact by their name or phone number.
On the far right side of the screen, you will see all of the contact's information. Here you can edit the contact's name, email, birthdate, tags, groups, or notes.
Make sure you click "save" when finished.
You can also, block a contact which keeps them from texting any of your numbers. It works just like it would work on your phone to block a person.
You can unsubscribe a person from your numbers as well. This opts them OUT of receiving messages from you but does not block them from texting you, and they are still able to opt back in if they want later.
You can Delete a contact as well.