Lexus 2004 GX470 Owner's Manual page 261

AUDIO
Radio text message:
If the radio receives a radio text message during FM reception,
"MSG" and a text message appears on the display. After the
text message goes off, "MSG" also goes off.
After the text message goes off from the display, pushing the
"TEXT" button during message reception shows the text
message again on the display.
The RDS audio system can store three messages consisting
of 64 characters in memory. To store a message in memory,
push the "TEXT" button until you hear a beep.
If three messages are already stored in memory, the oldest
message will be overwritten by the new message.
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To recall a radio text message, push the "TEXT" button. Each
time you push the button, the available message will be
displayed beginning with the newest one.
If there is no radio text message in memory and when no
message is received, "NO MESSAGE" appears on the display.
After this, the display returns to the previous mode.
Finish