Roadmaster ANDROID CAR NAVIGATION - 2 Function Operations; Basic Settings; User Defined Home Screen

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1.7.2 Android Keyboard Input
Switch the input method into Android keyboard (see switch
input method)
Remark:

You can click the number sign key to switch to
numbers and symbols input mode.

Click to switch letter case.
2. Function Operations
2.1 Basic Settings
2.1.1 User Defined Home Screen
There are 5 main screens of this device, sliding left or right to
switch. In any interface, you just need to click the HOME to get
back to main screen.
Note: You could add shortcut, widget and file in the blank area