Change function: knob 8 and pads 9/19 in Ableton preset

[Roroba]

Hi all

I Wonder if its possible change the function of knob 8 in ableton preset  for some pad with midi control.

I mean, change or select one track using pads moving to right or left with midi control. Lamentably I tried but I could not do it.

Also I tried change the function in pads 9/19 in ableton preset for some notes but lamentably I dont had success.

Thanks in advance

Regards.
Ro