JVC InteriArt AV-21QT4BU Instructions Manual page 11

Using the Decoder (EXT-2) function
Program (Programming) Menu
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To choose a channel in the PROGRAM menu:
When you complete the settings of PROGRAM
menu:
To give a channel name (NAME):
To delete a channel (DELETE):
To change the programme number of a channel
(INSERT):
To start AUTO PROGRAM (AUTOSTORE)