Jeep Grand Cherokee 2020 Owner's Manual page 401

Clock
After pressing the Clock button on the touchscreen, the following settings will be available:
Setting Name
Sync Time With GPS
Set Time Hours
NOTE:
The "Set Time Hours" feature will allow you to adjust the hours. The Sync Time With GPS button on the touchscreen must be unchecked.
Set Time Minutes
NOTE:
The "Set Time Minutes" feature will allow you to adjust the minutes. The Sync Time With GPS button on the touchscreen must be unchecked.
Time Format
Show Time in Status Bar — If Equipped
Camera
After pressing the Camera button on the touchscreen, the following settings will be available:
Setting Name
ParkView Backup Camera Delay
NOTE:
The "ParkView Backup Camera Delay" setting determines whether or not the screen will display the rear view image with dynamic grid lines for up to
10 seconds after the vehicle is shifted out of REVERSE. This delay will be canceled if the vehicle's speed exceeds 8 mph (13 km/h), the transmission
is shifted into PARK, or the ignition is switched to the OFF position.
Selectable Options
On
-
-
12 hrs
AM
On
Selectable Options
On
MULTIMEDIA 399
Off
+
+
24 hrs
PM
Off
9
Off