Recordbox MIDI setup

Can you add dedicated MIDI comand for FX2-1 SelectDown option.
There is only FX2-1 SelectUp option for selecting effect from list of FX2. With SelectUp MIDI I can jump through list from top to bottom, when I miss accidently  effect I am looking for I have to jump through whole list again(press 10 times or more If I miss again) I cant jump back. I would be very usefull to have both option Up and Down that I can assign to my DJ controler to navigate more efficient during performance. I tried assign knob to FX2-1 SelectUp  but It jumps through list so quick that is impossible to make selection.
Thank You