Auto trail drop down monitor ,how to alter the contrast

[kingfisher1]

Autotrail. Cheyenne 2007 ,I can't seem to find any info on how to alter the contrast on the drop down monitor for the reversing camera and tv does any one have any instructions on how to do it ,or point me to a user Manuel ,I don't know what make it is as there is no name on the monitor
Thanks

 

[Neckender]

|s there not a menu button on monitor or remote, if so scroll through menu.

John.

 

[kingfisher1]

Forgot about the remote ,I,ll try it and let you know