Help Please - Core Code CR151 LCD Transmitter - make car go slower

[mxer_kk]

Hi,

I've just bought the Core Code cr151 lcd transmitter for my son. It looks great and works with the cheap hobbyking hkr3000 receivers. I want to try and make his buggy go a bit slower. On the Hobbyking gun controller, I can adjust the throttle atv control.

Anyone know how to do the same think on the Core model please? It was alot simpler 20 years ago

Thanks.

Ian