Select the players you want to be in your group and then select OK. If you select players that you're already in a group with, those groups are displayed. To create a new group with these players, select Create New Group.
Send a message to get the conversation going.
If you want to message a player who isn't your friend, go to the Messages tab in step 2 and select New Message. Search for a player or choose a player from one of the lists.
You can also use PlayStation App on your mobile device to send messages to players.
You can react to incoming messages without having to leave your game. When you receive a message notification, press the PS button and select Reply.