Elusive clock adjustment settings. Symbol

Hi, can anyone help me with a seemingly impossible task - how to change the clock settings on my Symbols radio ( and thus on the dash screen)
At the moment it is 12 noon but the van system tells me it is 13.20 hours.
Handbook doesn't help, neither does internet.
A little job that wastes half a day......

Just a thought but when I set the clock on the dash of my car it also sets the clock on the radio.

Thanks Willy - but how to set the clock on the dash ? There seems to be no way to do that either!
It is very elusive

Thanks Willy - you made me go and look in the van again with the handbook and yes I have found the mode button to the right of the steering wheel I think you have very helpfully cracked it for me . Many thanks

You’re very welcome