Pioneer DMH-ZF8550BT Operation Manual page 60

Touch to mute. Touch again to cancel mute.
NOTE
The mute function is not available while the enhanced Siri function is used.
Touch [+]/[-] to adjust the guidance volume.
Displays the main sound volume. To adjust the main sound volume, touch
VOL (+/-) on the unit or touch [+]/[-].
NOTE
The volume menu is displayed for four seconds. If the menu disappears, touch VOL (+/-) again. The
menu reappears.
Using the split screen
You can display the screen of Apple CarPlay and of the unit at the same time on one
screen if the split screen function is available on your iPhone.
This function is useful such as when you want to operate the radio source while
displaying the map screen.
1
Touch to switch to the split screen view.
TIP
Touch if you want to return to the full screen.
TIP
The screen positions of the Apple CarPlay and of the unit depend on the [Driving Position] setting
(page 57).
Displays the source list.
Touch to see the selected source.
*
Displays the control panel corresponding to the selected source.
NOTE
The control panel is not displayed according to the source.
*
Displays the selected source information or function key.
* This button is displayed when iDatalink is available.
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