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From The re-PSUPedia
Cut-In Chat is a new feature designed to replace the old Symbol Chat.
- In order for a user to use Cut-In chat, type a message and hold down the tab button as you press enter, a picture of yourself will be displayed in the top right corner of the screen. Press ← and → to select various expressions, and then select the angle of your face by pressing ↑ and ↓ followed by pressing the enter button to finalize and display your message.
- Another method is to type the '@' key followed immediately by a number from 0-9 before the message. Additionally, you can add another number (0-3) following the first to choose the camera angle for the picture.
See Chat Macros for more detail.