Activate the following cheats by entering the corresponding codes at the in-game cheats menu:
CHEAT FUNCTION - CHEAT CODE
Unlock everything - "SHOWTIME"
Unlock all vehicle parts - "SUPERMAX"
Disable vehicle collisions - "GHOST"
Switch to chase view to see the rear of your vehicle. Make sure the camera is not locked then Hold L1 and press right analog-stick up or down to adjust the zoom.
Switch to the chase view to see the rear of your vehicle and make sure the camera is not locked. Hold L1 PlayStation3 and diagonally press Right Analog-stick Up/Left to Down/Right.