If you tap on the arrow to the right of someone's name in the contacts screen, you can see some more detailed information. All of your contacts have some information about them stored:
- Favourite status (top on the star in the top left corner to designate a contact as a favourite)
- First name
- Last name
- Your notes
You can edit their alias and notes by tapping the Edit button in the top right corner, then tapping the pencil icon next to the desired field. You will need to save any changes you make before exiting the contact's page.