A contact card displays when you mouse over a person on your Messenger List (without clicking).
On the contact card, you will see an expanded version of the person's Avatar or display image and links that let you quickly send an instant message, start a PC-to-PC call, send a text message to the person's mobile phone, or send an email.
You can also change your ]Stealth Settings for that person or add or edit contact details. Any information you add or change in the contact details will appear on the contact card in the future.
If the contact has a Yahoo! 360° account and is part of your 360° network, you will see if that person has posted new content, and a link on the contact card will connect you to the person's Yahoo! 360° page. If the person is not in 360°, you can invite them to join.