When non-full-screen messages are issued in full-screen mode, TSO/VTAM clears the screen and sends the non-full-screen messages to the screen. When the next full-screen message is issued, TSO/VTAM protects the screen contents to allow the user time to read the non-full-screen messages. TSO/VTAM protects the screen by displaying three asterisks (***) after the last non-full-screen message and unlocking the keyboard. When finished reading the screen, the user presses Enter to allow full-screen processing to resume.