JVC KD-S570 Manuel D'instructions page 18

Selecting the level display
You can select the level display according to your
preference.
When shipped from the factory, "VOL 2" is selected.
VOL 1: Shows the volume level indicator and the
equalization pattern indicator.
VOL 2: Alternates "VOL 1" setting and illumination
display.
OFF: Erase the volume level indicator and the
equalization pattern indicator.
1
Press and hold SEL for more than 2
seconds.
"CLOCK H", "CLOCK M", "SCM LINK" or
"LEVEL" appears on the display.
2
Select "LEVEL" if not shown on the
display.
"CLOCK H", "CLOCK M", "SCM LINK" or
"LEVEL" appears on the display.
18
3
Select the desired mode — "VOL 1",
"VOL 2" or "OFF".
4
Press SEL (select) to finish the setting.