Tap the top of the message thread. To recognize if a contact is a meta-contact, move your mouse on a contact in the Contact List window, and stop over it for a second: a small pop-up message will appear showing the of the contacts that form the meta-contact.
You can remove a person from a group iMessage that has at least three other people. Anyone in a group iMessage can add or remove someone from the conversation. A new window will open. You can only remove someone from a group text message if there are already three or more people in the group.
Remove someone from a group text message Tap the group text message that has the contact you want to remove. Tap Remove, then someons Done.
Type a message into the box at the bottom of the window and press Enter Send a message to a meta-contact From the Contact List window, right-click on the meta-contact. Type the contact information for the person you want to add, then tap Done.
Select the contact you want to have the conversation, and from the menu select Chat. Published Date:.