Final answer:
The door on a truck should be adjusted to align slightly inboard from the front fender for optimal functionality and aesthetics.
Step-by-step explanation:
When adjusting truck body panels, the alignment of a door to the front fender should be such that the door is aligned slightly inboard from the fender. This ensures a smooth surface transition and proper panel gaps for aesthetics and functionality. It is critical to maintain even spacing around the door to prevent excessive wear on components, ensure proper sealing against the weather, and contribute to the overall look and aerodynamics of the vehicle.