Where is the "Big Shot"?

Hello!
I didn’t find a topic about that problem so i created a new one. So I can’t find the option to take big shot, “LB” is “reinitialize exterior damages” and “RB” is “vignet style” and when i’m not in the effect mode and i push “RB” nothing happen just a weird sound. Please help me!!
Thank you very much, i’m french so sorry for my english ^^

I can’t be 100% sure but I think you have to press one of the analog sticks.

Thanks I’ll try, but I am on the xbox One, i don’t know if it changes anything but i forgot to say it

All in-game photos taken in Forza Motorsport 5 and Forza Horizon 2 on the Xbox One are uploaded to ForzaMotorsport.net as 1920X1080. There is no longer a need or a way to select a ‘big shot’ feature.