I think by default boost is circle (PlayStation) and B (xbox) and jump is x (PlayStation) and A (xbox). I believe roll/slide is mapped to square (PlayStation) and x (xbox). I changed boost to square/x and the roll button to l1/lb. I kept jump the same. It makes it much easier to jump/boost/roll/accelerate all at the same time.
I think by default boost is circle (PlayStation) and B (xbox) and jump is x (PlayStation) and A (xbox). I believe roll/slide is mapped to square (PlayStation) and x (xbox). I changed boost to square/x and the roll button to l1/lb. I kept jump the same. It makes it much easier to jump/boost/roll/accelerate all at the same time.