Lexus GS430 User Manual page 318

AUDIO
D Radio text
G22004
If the system receives a radio text from RDS station, "MSG"
appears on the display. Touch the "MSG" switch, and a text
message is displayed on the screen.
294
G22013
In case a text message is not accepted in a screen, you can
touch the "MSG" switch and hold it to display the rest of the
message.
When the system can show the station name, "RDS" appears
on the display. Each time you touch the "MSG" switch,
indication on the display changes from the band to the station
name, a radio text in this order. After six seconds passes,
indication returns to the band.