How do I update a person's name and contact information while viewing a conversation?

1. Click on the Inbox conversation.
2. Click on the i icon () located in the top right corner of conversation details..    
   
   
3. To add, click the + sign icon. Note you can designate new items as Primary.  Email addresses can be opted-in or out for newsletters and mobile numbers can be opted-in or out for SMS texting.
   
   
4. From the Conversation Details panel you can also edit a person's name, to edit click on the "Name".
   
5. The person's conversation record opens, click the pencil icon.
   
6. A Edit Person dialog opens, update the person's information and click Save.