Mazda MX-5 Miata 2004 Owner's Manual page 166

Changing the display mode
The display on the unit can be changed by
pressing the clock button (
alternates the display between time and
audio. When the clock mode has been
selected, the time will be displayed.
NOTE
If audio operation is selected while the
time mode is on, the selected audio
mode will be displayed for 10 seconds,
then the display will revert to the time
mode.
). This
Interior Comfort
Audio System
6-45