Final answer:
A stud rotated from the others in the wall is used to provide room for insulation in a corner, known as a California corner or two-stud corner.
Step-by-step explanation:
A corner stud that allows for ample room for insulation in the corner uses a stud that is rotated from the others in the wall. This method is known as the California corner or two-stud corner, which provides more space for insulation without compromising structural integrity. Instead of using three full studs nailed as a post, which leaves little room for insulation, or three small blocks, which might not be as structurally sound, rotating one stud allows for the desired insulation space in a more efficient way.